--- a/layout/style/nsRuleNode.cpp
+++ b/layout/style/nsRuleNode.cpp
@@ -118,32 +118,30 @@ static already_AddRefed<imgRequestProxy>
 CreateImageRequest(nsPresContext* aPresContext, const nsCSSValue& aValue)
 {
   RefPtr<imgRequestProxy> req =
     aValue.GetPossiblyStaticImageValue(aPresContext->Document(),
                                        aPresContext);
   return req.forget();
 }
 
-static void
-SetStyleImageRequest(std::function<void(nsStyleImageRequest*)> aCallback,
-                     nsPresContext* aPresContext,
-                     const nsCSSValue& aValue,
-                     nsStyleImageRequest::Mode aModeFlags =
-                       nsStyleImageRequest::Mode::Track)
+static already_AddRefed<nsStyleImageRequest>
+CreateStyleImageRequest(nsPresContext* aPresContext, const nsCSSValue& aValue,
+                        nsStyleImageRequest::Mode aModeFlags =
+                          nsStyleImageRequest::Mode::Track)
 {
   css::ImageValue* imageValue = aValue.GetImageStructValue();
   ImageTracker* imageTracker =
     (aModeFlags & nsStyleImageRequest::Mode::Track)
     ? aPresContext->Document()->ImageTracker()
     : nullptr;
   RefPtr<imgRequestProxy> proxy = CreateImageRequest(aPresContext, aValue);
   RefPtr<nsStyleImageRequest> request =
     new nsStyleImageRequest(aModeFlags, proxy, imageValue, imageTracker);
-  aCallback(request);
+  return request.forget();
 }
 
 template<typename ReferenceBox>
 static void
 SetStyleShapeSourceToCSSValue(StyleShapeSource<ReferenceBox>* aShapeSource,
                               const nsCSSValue* aValue,
                               nsStyleContext* aStyleContext,
                               nsPresContext* aPresContext,
@@ -1307,19 +1305,18 @@ static void SetStyleImageToImageRect(nsS
              aValue.EqualsFunction(eCSSKeyword__moz_image_rect),
              "the value is not valid -moz-image-rect()");
 
   nsCSSValue::Array* arr = aValue.GetArrayValue();
   MOZ_ASSERT(arr && arr->Count() == 6, "invalid number of arguments");
 
   // <uri>
   if (arr->Item(1).GetUnit() == eCSSUnit_Image) {
-    SetStyleImageRequest([&](nsStyleImageRequest* req) {
-      aResult.SetImageRequest(do_AddRef(req));
-    }, aStyleContext->PresContext(), arr->Item(1));
+    nsPresContext* pc = aStyleContext->PresContext();
+    aResult.SetImageRequest(CreateStyleImageRequest(pc, arr->Item(1)));
   } else {
     NS_WARNING("nsCSSValue::Image::Image() failed?");
   }
 
   // <top>, <right>, <bottom>, <left>
   nsStyleSides cropRect;
   NS_FOR_CSS_SIDES(side) {
     nsStyleCoord coord;
@@ -1341,34 +1338,32 @@ static void SetStyleImage(nsStyleContext
                           RuleNodeCacheConditions& aConditions)
 {
   if (aValue.GetUnit() == eCSSUnit_Null) {
     return;
   }
 
   aResult.SetNull();
 
+  nsPresContext* presContext = aStyleContext->PresContext();
   switch (aValue.GetUnit()) {
     case eCSSUnit_Image:
-      SetStyleImageRequest([&](nsStyleImageRequest* req) {
-        aResult.SetImageRequest(do_AddRef(req));
-      }, aStyleContext->PresContext(), aValue);
+      aResult.SetImageRequest(CreateStyleImageRequest(presContext, aValue));
       break;
     case eCSSUnit_Function:
       if (aValue.EqualsFunction(eCSSKeyword__moz_image_rect)) {
         SetStyleImageToImageRect(aStyleContext, aValue, aResult);
       } else {
         NS_NOTREACHED("-moz-image-rect() is the only expected function");
       }
       break;
     case eCSSUnit_Gradient:
     {
       nsStyleGradient* gradient = new nsStyleGradient();
-      SetGradient(aValue, aStyleContext->PresContext(), aStyleContext,
-                  *gradient, aConditions);
+      SetGradient(aValue, presContext, aStyleContext, *gradient, aConditions);
       aResult.SetGradientData(gradient);
       break;
     }
     case eCSSUnit_Element:
       aResult.SetElementId(aValue.GetStringBufferValue());
       break;
     case eCSSUnit_Initial:
     case eCSSUnit_Unset:
@@ -1390,17 +1385,17 @@ static void SetStyleImage(nsStyleContext
       // eCSSUnit_Image here.
 
       // Check #2.
       bool isLocalRef = aValue.GetURLStructValue()->IsLocalRef();
 
       // Check #3.
       bool isEqualExceptRef = false;
       if (!isLocalRef) {
-        nsIDocument* currentDoc = aStyleContext->PresContext()->Document();
+        nsIDocument* currentDoc = presContext->Document();
         nsIURI* docURI = currentDoc->GetDocumentURI();
         nsIURI* imageURI = aValue.GetURLValue();
         imageURI->EqualsExceptRef(docURI, &isEqualExceptRef);
       }
 
       MOZ_ASSERT(aStyleContext->IsStyleIfVisited() || isEqualExceptRef ||
                  isLocalRef,
                  "unexpected unit; maybe nsCSSValue::Image::Image() failed?");
@@ -5162,26 +5157,25 @@ nsRuleNode::ComputeUserInterfaceData(voi
     else {
       // The parser will never create a list that is *all* URL values --
       // that's invalid.
       MOZ_ASSERT(cursorUnit == eCSSUnit_List || cursorUnit == eCSSUnit_ListDep,
                  "unrecognized cursor unit");
       const nsCSSValueList* list = cursorValue->GetListValue();
       for ( ; list->mValue.GetUnit() == eCSSUnit_Array; list = list->mNext) {
         nsCSSValue::Array* arr = list->mValue.GetArrayValue();
-        SetStyleImageRequest([&](nsStyleImageRequest* req) {
-          nsCursorImage* item = ui->mCursorImages.AppendElement();
-          item->mImage = req;
-          if (arr->Item(1).GetUnit() != eCSSUnit_Null) {
-            item->mHaveHotspot = true;
-            item->mHotspotX = arr->Item(1).GetFloatValue();
-            item->mHotspotY = arr->Item(2).GetFloatValue();
-          }
-        }, aContext->PresContext(), arr->Item(0),
-           nsStyleImageRequest::Mode::Discard);
+        nsCursorImage* item = ui->mCursorImages.AppendElement();
+        item->mImage =
+          CreateStyleImageRequest(aContext->PresContext(), arr->Item(0),
+                                  nsStyleImageRequest::Mode::Discard);
+        if (arr->Item(1).GetUnit() != eCSSUnit_Null) {
+          item->mHaveHotspot = true;
+          item->mHotspotX = arr->Item(1).GetFloatValue();
+          item->mHotspotY = arr->Item(2).GetFloatValue();
+        }
       }
 
       NS_ASSERTION(list, "Must have non-array value at the end");
       NS_ASSERTION(list->mValue.GetUnit() == eCSSUnit_Enumerated,
                    "Unexpected fallback value at end of cursor list");
       ui->mCursor = list->mValue.GetIntValue();
     }
   }
@@ -8010,19 +8004,18 @@ nsRuleNode::ComputeListData(void* aStart
       break;
     default:
       NS_NOTREACHED("Unexpected value unit");
   }
 
   // list-style-image: url, none, inherit
   const nsCSSValue* imageValue = aRuleData->ValueForListStyleImage();
   if (eCSSUnit_Image == imageValue->GetUnit()) {
-    SetStyleImageRequest([&](nsStyleImageRequest* req) {
-      list->mListStyleImage = req;
-    }, mPresContext, *imageValue, nsStyleImageRequest::Mode(0));
+    list->mListStyleImage = CreateStyleImageRequest(
+      mPresContext, *imageValue, nsStyleImageRequest::Mode(0));
   }
   else if (eCSSUnit_None == imageValue->GetUnit() ||
            eCSSUnit_Initial == imageValue->GetUnit()) {
     list->mListStyleImage = nullptr;
   }
   else if (eCSSUnit_Inherit == imageValue->GetUnit() ||
            eCSSUnit_Unset == imageValue->GetUnit()) {
     conditions.SetUncacheable();