--- a/dom/base/nsFrameLoader.cpp
+++ b/dom/base/nsFrameLoader.cpp
@@ -1190,30 +1190,16 @@ nsFrameLoader::SwapWithOtherLoader(nsFra
                       ourContent->HasAttr(kNameSpaceID_None, nsGkAtoms::srcdoc);
   bool otherHasSrcdoc = otherContent->IsHTMLElement(nsGkAtoms::iframe) &&
                         otherContent->HasAttr(kNameSpaceID_None, nsGkAtoms::srcdoc);
   if (ourHasSrcdoc || otherHasSrcdoc) {
     // Ignore this case entirely for now, since we support XUL <-> HTML swapping
     return NS_ERROR_NOT_IMPLEMENTED;
   }
 
-  bool ourPassPointerEvents =
-    ourContent->AttrValueIs(kNameSpaceID_None,
-                            nsGkAtoms::mozpasspointerevents,
-                            nsGkAtoms::_true,
-                            eCaseMatters);
-  bool otherPassPointerEvents =
-    otherContent->AttrValueIs(kNameSpaceID_None,
-                              nsGkAtoms::mozpasspointerevents,
-                              nsGkAtoms::_true,
-                              eCaseMatters);
-  if (ourPassPointerEvents != otherPassPointerEvents) {
-    return NS_ERROR_NOT_IMPLEMENTED;
-  }
-
   bool ourFullscreenAllowed =
     ourContent->IsXULElement() ||
     (OwnerIsMozBrowserOrAppFrame() &&
       (ourContent->HasAttr(kNameSpaceID_None, nsGkAtoms::allowfullscreen) ||
        ourContent->HasAttr(kNameSpaceID_None, nsGkAtoms::mozallowfullscreen)));
   bool otherFullscreenAllowed =
     otherContent->IsXULElement() ||
     (aOther->OwnerIsMozBrowserOrAppFrame() &&
@@ -2657,23 +2643,16 @@ nsFrameLoader::TryRemoteBrowser()
   nsCOMPtr<nsIDOMChromeWindow> rootChromeWin = do_QueryInterface(rootWin);
 
   if (rootChromeWin) {
     nsCOMPtr<nsIBrowserDOMWindow> browserDOMWin;
     rootChromeWin->GetBrowserDOMWindow(getter_AddRefs(browserDOMWin));
     mRemoteBrowser->SetBrowserDOMWindow(browserDOMWin);
   }
 
-  if (mOwnerContent->AttrValueIs(kNameSpaceID_None,
-                                 nsGkAtoms::mozpasspointerevents,
-                                 nsGkAtoms::_true,
-                                 eCaseMatters)) {
-    Unused << mRemoteBrowser->SendSetUpdateHitRegion(true);
-  }
-
   ReallyLoadFrameScripts();
   InitializeBrowserAPI();
 
  return true;
 }
 
 mozilla::dom::PBrowserParent*
 nsFrameLoader::GetRemoteBrowser() const
@@ -2703,30 +2682,16 @@ NS_IMETHODIMP
 nsFrameLoader::DeactivateRemoteFrame() {
   if (mRemoteBrowser) {
     mRemoteBrowser->Deactivate();
     return NS_OK;
   }
   return NS_ERROR_UNEXPECTED;
 }
 
-void
-nsFrameLoader::ActivateUpdateHitRegion() {
-  if (mRemoteBrowser) {
-    Unused << mRemoteBrowser->SendSetUpdateHitRegion(true);
-  }
-}
-
-void
-nsFrameLoader::DeactivateUpdateHitRegion() {
-  if (mRemoteBrowser) {
-    Unused << mRemoteBrowser->SendSetUpdateHitRegion(false);
-  }
-}
-
 NS_IMETHODIMP
 nsFrameLoader::SendCrossProcessMouseEvent(const nsAString& aType,
                                           float aX,
                                           float aY,
                                           int32_t aButton,
                                           int32_t aClickCount,
                                           int32_t aModifiers,
                                           bool aIgnoreRootScrollFrame)

--- a/dom/base/nsFrameLoader.h
+++ b/dom/base/nsFrameLoader.h
@@ -213,19 +213,16 @@ public:
    * Applies a new set of sandbox flags. These are merged with the sandbox
    * flags from our owning content's owning document with a logical OR, this
    * ensures that we can only add restrictions and never remove them.
    */
   void ApplySandboxFlags(uint32_t sandboxFlags);
 
   void GetURL(nsString& aURL);
 
-  void ActivateUpdateHitRegion();
-  void DeactivateUpdateHitRegion();
-
   // Properly retrieves documentSize of any subdocument type.
   nsresult GetWindowDimensions(nsIntRect& aRect);
 
   virtual nsIMessageSender* GetProcessMessageManager() const override;
 
   // public because a callback needs these.
   RefPtr<nsFrameMessageManager> mMessageManager;
   nsCOMPtr<nsIInProcessContentFrameMessageManager> mChildMessageManager;

--- a/dom/base/nsGkAtomList.h
+++ b/dom/base/nsGkAtomList.h
@@ -623,17 +623,16 @@ GK_ATOM(mousedown, "mousedown")
 GK_ATOM(mousemove, "mousemove")
 GK_ATOM(mouseout, "mouseout")
 GK_ATOM(mouseover, "mouseover")
 GK_ATOM(mousethrough, "mousethrough")
 GK_ATOM(mouseup, "mouseup")
 GK_ATOM(mozaudiochannel, "mozaudiochannel")
 GK_ATOM(mozfullscreenchange, "mozfullscreenchange")
 GK_ATOM(mozfullscreenerror, "mozfullscreenerror")
-GK_ATOM(mozpasspointerevents, "mozpasspointerevents")
 GK_ATOM(mozpointerlockchange, "mozpointerlockchange")
 GK_ATOM(mozpointerlockerror, "mozpointerlockerror")
 GK_ATOM(mozprivatebrowsing, "mozprivatebrowsing")
 GK_ATOM(moz_opaque, "moz-opaque")
 GK_ATOM(moz_action_hint, "mozactionhint")
 GK_ATOM(x_moz_errormessage, "x-moz-errormessage")
 GK_ATOM(msthemecompatible, "msthemecompatible")
 GK_ATOM(multicol, "multicol")

--- a/dom/ipc/PBrowser.ipdl
+++ b/dom/ipc/PBrowser.ipdl
@@ -741,23 +741,16 @@ child:
     /**
      * Sent by the chrome process when it no longer wants this remote
      * <browser>.  The child side cleans up in response, then
      * finalizing its death by sending back __delete__() to the
      * parent.
      */
     async Destroy();
 
-
-    /**
-     * Tell the child side if it has to update it's touchable region
-     * to the parent.
-     */
-    async SetUpdateHitRegion(bool aEnabled);
-
     /**
      * Update the child side docShell active (resource use) state.
      *
      * @param aIsActive
      *        Whether to activate or deactivate the docshell.
      * @param aPreserveLayers
      *        Whether layer trees should be preserved for inactive docshells.
      * @param aLayerObserverEpoch

--- a/dom/ipc/TabChild.cpp
+++ b/dom/ipc/TabChild.cpp
@@ -530,17 +530,16 @@ TabChild::TabChild(nsIContentChild* aMan
   , mChromeFlags(aChromeFlags)
   , mActiveSuppressDisplayport(0)
   , mLayersId(0)
   , mAppPackageFileDescriptorRecved(false)
   , mDidFakeShow(false)
   , mNotified(false)
   , mTriedBrowserInit(false)
   , mOrientation(eScreenOrientation_PortraitPrimary)
-  , mUpdateHitRegion(false)
   , mIgnoreKeyPressEvent(false)
   , mHasValidInnerSize(false)
   , mDestroyed(false)
   , mUniqueId(aTabId)
   , mDPI(0)
   , mRounding(0)
   , mDefaultScale(0)
   , mIsTransparent(false)
@@ -2642,38 +2641,16 @@ TabChild::RecvDestroy()
   // that were just generated to have a chance to run.
   nsCOMPtr<nsIRunnable> deleteRunnable = new DelayedDeleteRunnable(this);
   MOZ_ALWAYS_SUCCEEDS(NS_DispatchToCurrentThread(deleteRunnable));
 
   return true;
 }
 
 bool
-TabChild::RecvSetUpdateHitRegion(const bool& aEnabled)
-{
-    mUpdateHitRegion = aEnabled;
-
-    // We need to trigger a repaint of the child frame to ensure that it
-    // recomputes and sends its region.
-    if (!mUpdateHitRegion) {
-      return true;
-    }
-
-    nsCOMPtr<nsIDocument> document(GetDocument());
-    NS_ENSURE_TRUE(document, true);
-    nsCOMPtr<nsIPresShell> presShell = document->GetShell();
-    NS_ENSURE_TRUE(presShell, true);
-    RefPtr<nsPresContext> presContext = presShell->GetPresContext();
-    NS_ENSURE_TRUE(presContext, true);
-    presContext->InvalidatePaintedLayers();
-
-    return true;
-}
-
-bool
 TabChild::RecvSetDocShellIsActive(const bool& aIsActive,
                                   const bool& aPreserveLayers,
                                   const uint64_t& aLayerObserverEpoch)
 {
   // Since SetDocShellIsActive requests come in from both the hang monitor
   // channel and the PContent channel, we have an ordering problem. This code
   // ensures that we respect the order in which the requests were made and
   // ignore stale requests.
@@ -3008,22 +2985,16 @@ TabChild::MakeHidden()
   // round-trip from CompositorBridgeChild to CompositorBridgeParent.
   compositor->RecvClearCachedResources(mLayersId);
 
   if (mPuppetWidget) {
     mPuppetWidget->Show(false);
   }
 }
 
-void
-TabChild::UpdateHitRegion(const nsRegion& aRegion)
-{
-  mRemoteFrame->SendUpdateHitRegion(aRegion);
-}
-
 NS_IMETHODIMP
 TabChild::GetMessageManager(nsIContentFrameMessageManager** aResult)
 {
   if (mTabChildGlobal) {
     NS_ADDREF(*aResult = mTabChildGlobal);
     return NS_OK;
   }
   *aResult = nullptr;

--- a/dom/ipc/TabChild.h
+++ b/dom/ipc/TabChild.h
@@ -513,20 +513,16 @@ public:
                                nsICachedFileDescriptorListener* aCallback);
 
   void CancelCachedFileDescriptorCallback(
                                   const nsAString& aPath,
                                   nsICachedFileDescriptorListener* aCallback);
 
   nsIContentChild* Manager() const { return mManager; }
 
-  bool GetUpdateHitRegion() const { return mUpdateHitRegion; }
-
-  void UpdateHitRegion(const nsRegion& aRegion);
-
   static inline TabChild*
   GetFrom(nsIDocShell* aDocShell)
   {
     if (!aDocShell) {
       return nullptr;
     }
 
     nsCOMPtr<nsITabChild> tc = aDocShell->GetTabChild();
@@ -662,18 +658,16 @@ protected:
   virtual ~TabChild();
 
   virtual PRenderFrameChild* AllocPRenderFrameChild() override;
 
   virtual bool DeallocPRenderFrameChild(PRenderFrameChild* aFrame) override;
 
   virtual bool RecvDestroy() override;
 
-  virtual bool RecvSetUpdateHitRegion(const bool& aEnabled) override;
-
   virtual bool RecvSetDocShellIsActive(const bool& aIsActive,
                                        const bool& aIsHidden,
                                        const uint64_t& aLayerObserverEpoch) override;
 
   virtual bool RecvNavigateByKey(const bool& aForward,
                                  const bool& aForDocumentNavigation) override;
 
   virtual bool RecvRequestNotifyAfterRemotePaint() override;
@@ -755,17 +749,16 @@ private:
   // At present only 1 of these is really expected.
   AutoTArray<nsAutoPtr<CachedFileDescriptorInfo>, 1>
       mCachedFileDescriptorInfos;
   nscolor mLastBackgroundColor;
   bool mDidFakeShow;
   bool mNotified;
   bool mTriedBrowserInit;
   ScreenOrientationInternal mOrientation;
-  bool mUpdateHitRegion;
 
   bool mIgnoreKeyPressEvent;
   RefPtr<APZEventState> mAPZEventState;
   SetAllowedTouchBehaviorCallback mSetAllowedTouchBehaviorCallback;
   bool mHasValidInnerSize;
   bool mDestroyed;
   // Position of client area relative to the outer window
   LayoutDeviceIntPoint mClientOffset;

--- a/layout/base/nsDisplayList.cpp
+++ b/layout/base/nsDisplayList.cpp
@@ -2018,20 +2018,16 @@ GetMouseThrough(const nsIFrame* aFrame)
     frame = nsBox::GetParentXULBox(frame);
   }
   return false;
 }
 
 static bool
 IsFrameReceivingPointerEvents(nsIFrame* aFrame)
 {
-  nsSubDocumentFrame* frame = do_QueryFrame(aFrame);
-  if (frame && frame->PassPointerEventsToChildren()) {
-    return true;
-  }
   return NS_STYLE_POINTER_EVENTS_NONE !=
     aFrame->StyleUserInterface()->GetEffectivePointerEvents(aFrame);
 }
 
 // A list of frames, and their z depth. Used for sorting
 // the results of hit testing.
 struct FramesWithDepth
 {
@@ -3671,17 +3667,17 @@ nsDisplayEventReceiver::HitTest(nsDispla
 void
 nsDisplayLayerEventRegions::AddFrame(nsDisplayListBuilder* aBuilder,
                                      nsIFrame* aFrame)
 {
   NS_ASSERTION(aBuilder->FindReferenceFrameFor(aFrame) == aBuilder->FindReferenceFrameFor(mFrame),
                "Reference frame mismatch");
   if (aBuilder->IsInsidePointerEventsNoneDoc()) {
     // Somewhere up the parent document chain is a subdocument with pointer-
-    // events:none set on it (and without a mozpasspointerevents).
+    // events:none set on it.
     return;
   }
   if (!aFrame->GetParent()) {
     MOZ_ASSERT(aFrame->GetType() == nsGkAtoms::viewportFrame);
     // Viewport frames are never event targets, other frames, like canvas frames,
     // are the event targets for any regions viewport frames may cover.
     return;
   }

--- a/layout/base/nsDisplayList.h
+++ b/layout/base/nsDisplayList.h
@@ -514,17 +514,17 @@ public:
   /**
    * Get the caret associated with the current presshell.
    */
   nsCaret* GetCaret();
   /**
    * Notify the display list builder that we're entering a presshell.
    * aReferenceFrame should be a frame in the new presshell.
    * aPointerEventsNoneDoc should be set to true if the frame generating this
-   * document is pointer-events:none without mozpasspointerevents.
+   * document is pointer-events:none.
    */
   void EnterPresShell(nsIFrame* aReferenceFrame,
                       bool aPointerEventsNoneDoc = false);
   /**
    * For print-preview documents, we sometimes need to build display items for
    * the same frames multiple times in the same presentation, with different
    * clipping. Between each such batch of items, call
    * ResetMarkedFramesForDisplayList to make sure that the results of
@@ -1171,17 +1171,17 @@ private:
   struct PresShellState {
     nsIPresShell* mPresShell;
     nsIFrame*     mCaretFrame;
     nsRect        mCaretRect;
     uint32_t      mFirstFrameMarkedForDisplay;
     bool          mIsBackgroundOnly;
     // This is a per-document flag turning off event handling for all content
     // in the document, and is set when we enter a subdocument for a pointer-
-    // events:none frame that doesn't have mozpasspointerevents set.
+    // events:none frame.
     bool          mInsidePointerEventsNoneDoc;
   };
 
   PresShellState* CurrentPresShellState() {
     NS_ASSERTION(mPresShellStates.Length() > 0,
                  "Someone forgot to enter a presshell");
     return &mPresShellStates[mPresShellStates.Length() - 1];
   }

--- a/layout/base/nsPresShell.cpp
+++ b/layout/base/nsPresShell.cpp
@@ -6217,57 +6217,16 @@ public:
     mShell->GetPresContext()->NotifyDidPaintForSubtree(mFlags);
   }
 
 private:
   PresShell* mShell;
   uint32_t mFlags;
 };
 
-class AutoUpdateHitRegion
-{
-public:
-  AutoUpdateHitRegion(PresShell* aShell, nsIFrame* aFrame)
-    : mShell(aShell), mFrame(aFrame)
-  {
-  }
-  ~AutoUpdateHitRegion()
-  {
-    if (!XRE_IsContentProcess() ||
-        !mFrame || !mShell) {
-      return;
-    }
-    TabChild* tabChild = TabChild::GetFrom(mShell);
-    if (!tabChild || !tabChild->GetUpdateHitRegion()) {
-      return;
-    }
-    nsRegion region;
-    nsDisplayListBuilder builder(mFrame,
-                                 nsDisplayListBuilderMode::EVENT_DELIVERY,
-                                 /* aBuildCert= */ false);
-    nsDisplayList list;
-    AutoTArray<nsIFrame*, 100> outFrames;
-    nsDisplayItem::HitTestState hitTestState;
-    builder.EnterPresShell(mFrame);
-    nsRect bounds = mShell->GetPresContext()->GetVisibleArea();
-    mFrame->BuildDisplayListForStackingContext(&builder, bounds, &list);
-    builder.LeavePresShell(mFrame);
-    list.HitTest(&builder, bounds, &hitTestState, &outFrames);
-    list.DeleteAll();
-    for (int32_t i = outFrames.Length() - 1; i >= 0; --i) {
-      region.Or(region, nsLayoutUtils::TransformFrameRectToAncestor(
-                  outFrames[i], nsRect(nsPoint(0, 0), outFrames[i]->GetSize()), mFrame));
-    }
-    tabChild->UpdateHitRegion(region);
-  }
-private:
-  PresShell* mShell;
-  nsIFrame* mFrame;
-};
-
 void
 PresShell::RecordShadowStyleChange(ShadowRoot* aShadowRoot)
 {
   mChangedScopeStyleRoots.AppendElement(aShadowRoot->GetHost()->AsElement());
 }
 
 void
 PresShell::Paint(nsView*        aViewToPaint,
@@ -6292,17 +6251,16 @@ PresShell::Paint(nsView*        aViewToP
   nsIFrame* frame = aViewToPaint->GetFrame();
 
   LayerManager* layerManager =
     aViewToPaint->GetWidget()->GetLayerManager();
   NS_ASSERTION(layerManager, "Must be in paint event");
   bool shouldInvalidate = layerManager->NeedsWidgetInvalidation();
 
   nsAutoNotifyDidPaint notifyDidPaint(this, aFlags);
-  AutoUpdateHitRegion updateHitRegion(this, frame);
 
   // Whether or not we should set first paint when painting is
   // suppressed is debatable. For now we'll do it because
   // B2G relies on first paint to configure the viewport and
   // we only want to do that when we have real content to paint.
   // See Bug 798245
   if (mIsFirstPaint && !mPaintingSuppressed) {
     layerManager->SetIsFirstPaint();

--- a/layout/base/tests/chrome/chrome.ini
+++ b/layout/base/tests/chrome/chrome.ini
@@ -6,18 +6,16 @@ support-files =
   bug495648.rdf
   bug551434_childframe.html
   chrome_content_integration_window.xul
   chrome_over_plugin_window.xul
   default_background_window.xul
   dialog_with_positioning_window.xul
   no_clip_iframe_subdoc.html
   no_clip_iframe_window.xul
-  passpointerevents_window.html
-  passpointerevents_dynamically_window.html
   printpreview_bug396024_helper.xul
   printpreview_bug482976_helper.xul
   printpreview_helper.xul
   file_bug1018265.xul
 
 [test_bug396367-1.html]
 [test_bug396367-2.html]
 [test_bug420499.xul]
@@ -52,20 +50,16 @@ skip-if = buildapp == 'b2g'
 tags = openwindow
 skip-if = buildapp == 'b2g'
 [test_fixed_bg_scrolling_repaints.html]
 skip-if = buildapp == 'b2g'
 [test_leaf_layers_partition_browser_window.xul]
 skip-if = (!debug) || (toolkit == "cocoa") || (os == "linux") || (buildapp == 'b2g') # Disabled on Mac and Linux because of Bug 992311
 [test_no_clip_iframe.xul]
 skip-if = buildapp == 'b2g'
-[test_passpointerevents.html]
-skip-if = buildapp == 'b2g'
-[test_passpointerevents_dynamic.html]
-skip-if = buildapp == 'b2g'
 [test_prerendered_transforms.html]
 skip-if = buildapp == 'b2g'
 [test_printpreview.xul]
 skip-if = buildapp == 'b2g' || (os == "linux" && bits == 32) # Disabled on Linux32 for bug 1278957
 [test_printpreview_bug396024.xul]
 skip-if = buildapp == 'b2g'
 [test_printpreview_bug482976.xul]
 skip-if = buildapp == 'b2g'

deleted file mode 100644
--- a/layout/base/tests/chrome/passpointerevents_dynamically_window.html
+++ /dev/null
@@ -1,28 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test that mozpasspointerevents works after setting it dynamically</title>
-</head>
-<body onload="startTest()">
-<iframe id="f" style="border:none; width:200px; height:200px; pointer-events:none"
-        src="data:text/html,<html style='pointer-events:none'><div style='margin:100px; width:100px; height:100px; background:yellow; pointer-events:auto'>">
-</iframe>
-
-<script type="application/javascript">
-var SimpleTest = window.opener.SimpleTest;
-var is = window.opener.is;
-
-function startTest() {
-  var f = document.getElementById("f");
-  f.setAttribute("mozpasspointerevents", true);
-  var fRect = f.getBoundingClientRect();
-  var e1 = document.elementFromPoint(fRect.left + 10, fRect.top + 10);
-  is(e1, document.body, "check point in transparent region of the iframe");
-  var e2 = document.elementFromPoint(fRect.left + 110, fRect.top + 110);
-  is(e2, f, "check point in opaque region of the iframe");
-  window.close();
-  SimpleTest.finish();
-}
-</script>
-</body>
-</html>

deleted file mode 100644
--- a/layout/base/tests/chrome/passpointerevents_window.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test that mozpasspointerevents works</title>
-</head>
-<body onload="startTest()">
-<iframe id="f" style="border:none; width:200px; height:200px; pointer-events:none" mozpasspointerevents
-        src="data:text/html,<html style='pointer-events:none'><div style='margin:100px; width:100px; height:100px; background:yellow; pointer-events:auto'>">
-</iframe>
-
-<script type="application/javascript">
-var SimpleTest = window.opener.SimpleTest;
-var is = window.opener.is;
-
-function startTest() {
-  var f = document.getElementById("f");
-  var fRect = f.getBoundingClientRect();
-  var e1 = document.elementFromPoint(fRect.left + 10, fRect.top + 10);
-  is(e1, document.body, "check point in transparent region of the iframe");
-  var e2 = document.elementFromPoint(fRect.left + 110, fRect.top + 110);
-  is(e2, f, "check point in opaque region of the iframe");
-  window.close();
-  SimpleTest.finish();
-}
-</script>
-</body>
-</html>

deleted file mode 100644
--- a/layout/base/tests/chrome/test_passpointerevents.html
+++ /dev/null
@@ -1,21 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test that mozpasspointerevents works</title>
-  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="application/javascript" src="chrome://mochikit/content/chrome-harness.js"></script>
-  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<pre id="test">
-<script type="application/javascript">
-SimpleTest.waitForExplicitFinish();
-
-var root = getRootDirectory(window.location.href);
-window.openDialog(root + "passpointerevents_window.html", "passpointerevents",
-                  "chrome,width=400,height=400");
-</script>
-</pre>
-</body>
-</html>

deleted file mode 100644
--- a/layout/base/tests/chrome/test_passpointerevents_dynamic.html
+++ /dev/null
@@ -1,21 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test that mozpasspointerevents works after setting it dynamically</title>
-  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
-  <script type="application/javascript" src="chrome://mochikit/content/chrome-harness.js"></script>
-  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
-</head>
-<body>
-
-<pre id="test">
-<script type="application/javascript">
-SimpleTest.waitForExplicitFinish();
-
-var root = getRootDirectory(window.location.href);
-window.openDialog(root + "passpointerevents_dynamically_window.html",
-                  "passpointerevents", "chrome,width=400,height=400");
-</script>
-</pre>
-</body>
-</html>

--- a/layout/base/tests/mochitest.ini
+++ b/layout/base/tests/mochitest.ini
@@ -239,17 +239,16 @@ skip-if = buildapp == 'mulet' || buildap
 [test_bug646757.html]
 [test_bug718809.html]
 [test_bug725426.html]
 [test_bug731777.html]
 [test_bug761572.html]
 [test_bug770106.html]
 [test_remote_frame.html]
 skip-if = (buildapp == 'b2g' && toolkit != 'gonk') #Bug 931116, b2g desktop specific, initial triage
-[test_remote_passpointerevents.html]
 [test_bug842853.html]
 [test_bug842853-2.html]
 [test_bug849219.html]
 [test_bug851485.html]
 [test_bug851445.html]
 support-files = bug851445_helper.html
 [test_bug970964.html]
 support-files = bug970964_inner.html

deleted file mode 100644
--- a/layout/base/tests/test_remote_passpointerevents.html
+++ /dev/null
@@ -1,52 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-  <head>
-    <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-    <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
-  </head>
-  <body>
-    <script type="application/javascript;version=1.7">
-      "use strict";
-
-      SimpleTest.waitForExplicitFinish();
-
-      function checkPointerEvents() {
-        let iframe = this;
-        let fRect = iframe.getBoundingClientRect();
-        let e1 = document.elementFromPoint(fRect.left + 10, fRect.top + 10);
-        let e2 = document.elementFromPoint(fRect.left + 110, fRect.top + 110);
-        if (e1 === document.body && e2 === iframe) {
-          is(e1, document.body, "check point in transparent region of the iframe");
-          is(e2, iframe, "check point in opaque region of the iframe");
-          SimpleTest.finish();
-        }
-        else {
-          SimpleTest.executeSoon(checkPointerEvents.bind(iframe));
-        }
-      }
-
-      function runTest() {
-        let iframe = document.createElement("iframe");
-        SpecialPowers.wrap(iframe).setAttribute('mozbrowser', 'true');
-        SpecialPowers.wrap(iframe).setAttribute('mozpasspointerevents', 'true');
-        SpecialPowers.wrap(iframe).setAttribute('remote', 'true');
-        iframe.style = "border:none; width:400px; height:400px; pointer-events:none";
-        iframe.src = "data:text/html,<html style='pointer-events:none'><div style='margin:100px; width:100px; height:100px; background:yellow; pointer-events:auto'>";
-
-        document.body.appendChild(iframe);
-
-        SimpleTest.executeSoon(checkPointerEvents.bind(iframe));
-      }
-      addEventListener("load", function() {
-        SpecialPowers.addPermission("browser", true, document);
-        SpecialPowers.addPermission("embed-apps", true, document);
-        SpecialPowers.pushPrefEnv({
-          "set": [
-            ["dom.ipc.browser_frames.oop_by_default", true],
-            ["dom.mozBrowserFramesEnabled", true]
-          ]
-        }, runTest);
-      });
-    </script>
-  </body>
-</html>

--- a/layout/generic/nsSubDocumentFrame.cpp
+++ b/layout/generic/nsSubDocumentFrame.cpp
@@ -302,41 +302,16 @@ nsSubDocumentFrame::GetSubdocumentSize()
       docSizeAppUnits = destRect.Size();
     }
 
     return ScreenIntSize(presContext->AppUnitsToDevPixels(docSizeAppUnits.width),
                          presContext->AppUnitsToDevPixels(docSizeAppUnits.height));
   }
 }
 
-bool
-nsSubDocumentFrame::PassPointerEventsToChildren()
-{
-  // Limit use of mozpasspointerevents to documents with embedded:apps/chrome
-  // permission, because this could be used by the parent document to discover
-  // which parts of the subdocument are transparent to events (if subdocument
-  // uses pointer-events:none on its root element, which is admittedly
-  // unlikely)
-  if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::mozpasspointerevents)) {
-      if (PresContext()->IsChrome()) {
-        return true;
-      }
-
-      nsCOMPtr<nsIPermissionManager> permMgr =
-        services::GetPermissionManager();
-      if (permMgr) {
-        uint32_t permission = nsIPermissionManager::DENY_ACTION;
-        permMgr->TestPermissionFromPrincipal(GetContent()->NodePrincipal(),
-                                             "embed-apps", &permission);
-        return permission == nsIPermissionManager::ALLOW_ACTION;
-      }
-  }
-  return false;
-}
-
 static void
 WrapBackgroundColorInOwnLayer(nsDisplayListBuilder* aBuilder,
                               nsIFrame* aFrame,
                               nsDisplayList* aList)
 {
   nsDisplayList tempItems;
   nsDisplayItem* item;
   while ((item = aList->RemoveBottom()) != nullptr) {
@@ -375,32 +350,24 @@ nsSubDocumentFrame::BuildDisplayList(nsD
       // own layer so we generate a ColorLayer. This is helpful for optimizing
       // compositing; we can skip compositing the ColorLayer when the
       // remote content is opaque.
       WrapBackgroundColorInOwnLayer(aBuilder, this, decorations.BorderBackground());
     }
     decorations.MoveTo(aLists);
   }
 
-  // We only care about mozpasspointerevents if we're doing hit-testing
-  // related things.
-  bool passPointerEventsToChildren =
-    (aBuilder->IsForEventDelivery() || aBuilder->IsBuildingLayerEventRegions())
-    ? PassPointerEventsToChildren() : false;
-
-  // If mozpasspointerevents is set, then we should allow subdocument content
-  // to handle events even if we're pointer-events:none.
-  if (aBuilder->IsForEventDelivery() && pointerEventsNone && !passPointerEventsToChildren) {
+  if (aBuilder->IsForEventDelivery() && pointerEventsNone) {
     return;
   }
 
   // If we're passing pointer events to children then we have to descend into
   // subdocuments no matter what, to determine which parts are transparent for
   // hit-testing or event regions.
-  bool needToDescend = aBuilder->GetDescendIntoSubdocuments() || passPointerEventsToChildren;
+  bool needToDescend = aBuilder->GetDescendIntoSubdocuments();
   if (!mInnerView || !needToDescend) {
     return;
   }
 
   if (rfp) {
     rfp->BuildDisplayList(aBuilder, this, aDirtyRect, aLists);
     return;
   }
@@ -443,18 +410,17 @@ nsSubDocumentFrame::BuildDisplayList(nsD
 
       ignoreViewportScrolling = presShell->IgnoringViewportScrolling();
       if (ignoreViewportScrolling) {
         savedIgnoreScrollFrame = aBuilder->GetIgnoreScrollFrame();
         aBuilder->SetIgnoreScrollFrame(rootScrollFrame);
       }
     }
 
-    aBuilder->EnterPresShell(subdocRootFrame,
-                             pointerEventsNone && !passPointerEventsToChildren);
+    aBuilder->EnterPresShell(subdocRootFrame, pointerEventsNone);
   } else {
     dirty = aDirtyRect;
   }
 
   DisplayListClipState::AutoSaveRestore clipState(aBuilder);
   if (ShouldClipSubdocument()) {
     clipState.ClipContainingBlockDescendantsToContentBox(aBuilder, this);
   }
@@ -908,26 +874,16 @@ nsSubDocumentFrame::AttributeChanged(int
     // Retrieve the attributes
     CSSIntSize margins = GetMarginAttributes();
 
     // Notify the frameloader
     RefPtr<nsFrameLoader> frameloader = FrameLoader();
     if (frameloader)
       frameloader->MarginsChanged(margins.width, margins.height);
   }
-  else if (aAttribute == nsGkAtoms::mozpasspointerevents) {
-    RefPtr<nsFrameLoader> frameloader = FrameLoader();
-    if (frameloader) {
-      if (aModType == nsIDOMMutationEvent::ADDITION) {
-        frameloader->ActivateUpdateHitRegion();
-      } else if (aModType == nsIDOMMutationEvent::REMOVAL) {
-        frameloader->DeactivateUpdateHitRegion();
-      }
-    }
-  }
 
   return NS_OK;
 }
 
 nsIFrame*
 NS_NewSubDocumentFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
 {
   return new (aPresShell) nsSubDocumentFrame(aContext);

--- a/layout/ipc/PRenderFrame.ipdl
+++ b/layout/ipc/PRenderFrame.ipdl
@@ -25,17 +25,15 @@ namespace layout {
  */
 sync protocol PRenderFrame
 {
     manager PBrowser;
 
 parent:
     async NotifyCompositorTransaction();
 
-    async UpdateHitRegion(nsRegion aRegion);
-
     sync TakeFocusForClickFromTap();
 
     async __delete__();
 };
 
 } // namespace layout
 } // namespace mozilla

--- a/layout/ipc/RenderFrameParent.cpp
+++ b/layout/ipc/RenderFrameParent.cpp
@@ -236,23 +236,16 @@ RenderFrameParent::ActorDestroy(ActorDes
 
 bool
 RenderFrameParent::RecvNotifyCompositorTransaction()
 {
   TriggerRepaint();
   return true;
 }
 
-bool
-RenderFrameParent::RecvUpdateHitRegion(const nsRegion& aRegion)
-{
-  mTouchRegion = aRegion;
-  return true;
-}
-
 void
 RenderFrameParent::TriggerRepaint()
 {
   nsIFrame* docFrame = mFrameLoader->GetPrimaryFrameOfOwningContent();
   if (!docFrame) {
     // Bad, but nothing we can do about it (XXX/cjones: or is there?
     // maybe bug 589337?).  When the new frame is created, we'll
     // probably still be the current render frame and will get to draw
@@ -283,22 +276,16 @@ RenderFrameParent::BuildDisplayList(nsDi
   nsPoint offset = aBuilder->ToReferenceFrame(aFrame);
   nsRect bounds = aFrame->EnsureInnerView()->GetBounds() + offset;
   clipState.ClipContentDescendants(bounds);
 
   aLists.Content()->AppendToTop(
     new (aBuilder) nsDisplayRemote(aBuilder, aFrame, this));
 }
 
-bool
-RenderFrameParent::HitTest(const nsRect& aRect)
-{
-  return mTouchRegion.Contains(aRect);
-}
-
 void
 RenderFrameParent::GetTextureFactoryIdentifier(TextureFactoryIdentifier* aTextureFactoryIdentifier)
 {
   RefPtr<LayerManager> lm = mFrameLoader ? GetFrom(mFrameLoader) : nullptr;
   // Perhaps the document containing this frame currently has no presentation?
   if (lm && lm->AsClientLayerManager()) {
     *aTextureFactoryIdentifier = lm->AsClientLayerManager()->GetTextureFactoryIdentifier();
   } else {
@@ -356,17 +343,16 @@ nsDisplayRemote::nsDisplayRemote(nsDispl
                                  nsSubDocumentFrame* aFrame,
                                  RenderFrameParent* aRemoteFrame)
   : nsDisplayItem(aBuilder, aFrame)
   , mRemoteFrame(aRemoteFrame)
   , mEventRegionsOverride(EventRegionsOverride::NoOverride)
 {
   if (aBuilder->IsBuildingLayerEventRegions()) {
     bool frameIsPointerEventsNone =
-      !aFrame->PassPointerEventsToChildren() &&
       aFrame->StyleUserInterface()->GetEffectivePointerEvents(aFrame) ==
         NS_STYLE_POINTER_EVENTS_NONE;
     if (aBuilder->IsInsidePointerEventsNoneDoc() || frameIsPointerEventsNone) {
       mEventRegionsOverride |= EventRegionsOverride::ForceEmptyHitRegion;
     }
     if (nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(aFrame->PresContext()->PresShell())) {
       mEventRegionsOverride |= EventRegionsOverride::ForceDispatchToContent;
     }
@@ -382,18 +368,8 @@ nsDisplayRemote::BuildLayer(nsDisplayLis
   nsIntRect visibleRect = GetVisibleRect().ToNearestPixels(appUnitsPerDevPixel);
   visibleRect += aContainerParameters.mOffset;
   RefPtr<Layer> layer = mRemoteFrame->BuildLayer(aBuilder, mFrame, aManager, visibleRect, this, aContainerParameters);
   if (layer && layer->AsContainerLayer()) {
     layer->AsContainerLayer()->SetEventRegionsOverride(mEventRegionsOverride);
   }
   return layer.forget();
 }
-
-void
-nsDisplayRemote::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
-                         HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
-{
-  if (mRemoteFrame->HitTest(aRect)) {
-    aOutFrames->AppendElement(mFrame);
-  }
-}
-

--- a/layout/ipc/RenderFrameParent.h
+++ b/layout/ipc/RenderFrameParent.h
@@ -86,18 +86,16 @@ public:
 
   void EnsureLayersConnected();
 
 protected:
   void ActorDestroy(ActorDestroyReason why) override;
 
   virtual bool RecvNotifyCompositorTransaction() override;
 
-  virtual bool RecvUpdateHitRegion(const nsRegion& aRegion) override;
-
   virtual bool RecvTakeFocusForClickFromTap() override;
 
 private:
   void TriggerRepaint();
   void DispatchEventForPanZoomController(const InputEvent& aEvent);
 
   uint64_t GetLayerTreeId() const;
 
@@ -120,18 +118,16 @@ private:
   // Prefer the extra bit of state to null'ing out mFrameLoader in
   // Destroy() so that less code needs to be special-cased for after
   // Destroy().
   // 
   // It's possible for mFrameLoader==null and
   // mFrameLoaderDestroyed==false.
   bool mFrameLoaderDestroyed;
 
-  nsRegion mTouchRegion;
-
   bool mAsyncPanZoomEnabled;
   bool mInitted;
 };
 
 } // namespace layout
 } // namespace mozilla
 
 /**
@@ -151,19 +147,16 @@ public:
                                    LayerManager* aManager,
                                    const ContainerLayerParameters& aParameters) override
   { return mozilla::LAYER_ACTIVE_FORCE; }
 
   virtual already_AddRefed<Layer>
   BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager,
              const ContainerLayerParameters& aContainerParameters) override;
 
-  void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
-               HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) override;
-
   NS_DISPLAY_DECL_NAME("Remote", TYPE_REMOTE)
 
 private:
   RenderFrameParent* mRemoteFrame;
   mozilla::layers::EventRegionsOverride mEventRegionsOverride;
 };