--- a/gfx/layers/ipc/CompositorBridgeParent.cpp
+++ b/gfx/layers/ipc/CompositorBridgeParent.cpp
@@ -1135,32 +1135,16 @@ CompositorBridgeParent::AllocPAPZParent(
 bool
 CompositorBridgeParent::DeallocPAPZParent(PAPZParent* aActor)
 {
   RemoteContentController* controller = static_cast<RemoteContentController*>(aActor);
   controller->Release();
   return true;
 }
 
-mozilla::ipc::IPCResult
-CompositorBridgeParent::RecvGetCompositorOptions(const uint64_t& aLayersId,
-                                                 CompositorOptions* aOptions)
-{
-  // The CompositorBridgeParent associated with the layers id should be this
-  // one.
-  if (aLayersId != 0) {
-#ifdef DEBUG
-    MonitorAutoLock lock(*sIndirectLayerTreesLock);
-    MOZ_ASSERT(sIndirectLayerTrees[aLayersId].mParent == this);
-#endif
-  }
-  *aOptions = mOptions;
-  return IPC_OK();
-}
-
 RefPtr<APZCTreeManager>
 CompositorBridgeParent::GetAPZCTreeManager()
 {
   return mApzcTreeManager;
 }
 
 CompositorBridgeParent*
 CompositorBridgeParent::GetCompositorBridgeParentFromLayersId(const uint64_t& aLayersId)

--- a/gfx/layers/ipc/CompositorBridgeParent.h
+++ b/gfx/layers/ipc/CompositorBridgeParent.h
@@ -441,19 +441,16 @@ public:
   void ForceComposeToTarget(gfx::DrawTarget* aTarget, const gfx::IntRect* aRect = nullptr);
 
   PAPZCTreeManagerParent* AllocPAPZCTreeManagerParent(const uint64_t& aLayersId) override;
   bool DeallocPAPZCTreeManagerParent(PAPZCTreeManagerParent* aActor) override;
 
   PAPZParent* AllocPAPZParent(const uint64_t& aLayersId) override;
   bool DeallocPAPZParent(PAPZParent* aActor) override;
 
-  mozilla::ipc::IPCResult RecvGetCompositorOptions(const uint64_t& aLayersId,
-                                                   CompositorOptions* aOptions) override;
-
   RefPtr<APZCTreeManager> GetAPZCTreeManager();
 
   CompositorOptions GetOptions() const {
     return mOptions;
   }
 
   PWebRenderBridgeParent* AllocPWebRenderBridgeParent(const wr::PipelineId& aPipelineId,
                                                       const LayoutDeviceIntSize& aSize,

--- a/gfx/layers/ipc/CrossProcessCompositorBridgeParent.cpp
+++ b/gfx/layers/ipc/CrossProcessCompositorBridgeParent.cpp
@@ -107,35 +107,16 @@ bool
 CrossProcessCompositorBridgeParent::DeallocPLayerTransactionParent(PLayerTransactionParent* aLayers)
 {
   LayerTransactionParent* slp = static_cast<LayerTransactionParent*>(aLayers);
   EraseLayerState(slp->GetId());
   static_cast<LayerTransactionParent*>(aLayers)->ReleaseIPDLReference();
   return true;
 }
 
-mozilla::ipc::IPCResult
-CrossProcessCompositorBridgeParent::RecvGetCompositorOptions(const uint64_t& aLayersId,
-                                                             CompositorOptions* aOptions)
-{
-  // Check to see if this child process has access to this layer tree.
-  if (!LayerTreeOwnerTracker::Get()->IsMapped(aLayersId, OtherPid())) {
-    NS_ERROR("Unexpected layers id in RecvGetCompositorOptions; dropping message...");
-    return IPC_FAIL_NO_REASON(this);
-  }
-
-  MonitorAutoLock lock(*sIndirectLayerTreesLock);
-  CompositorBridgeParent::LayerTreeState& state = sIndirectLayerTrees[aLayersId];
-
-  if (state.mParent) {
-    *aOptions = state.mParent->GetOptions();
-  }
-  return IPC_OK();
-}
-
 PAPZCTreeManagerParent*
 CrossProcessCompositorBridgeParent::AllocPAPZCTreeManagerParent(const uint64_t& aLayersId)
 {
   // Check to see if this child process has access to this layer tree.
   if (!LayerTreeOwnerTracker::Get()->IsMapped(aLayersId, OtherPid())) {
     NS_ERROR("Unexpected layers id in AllocPAPZCTreeManagerParent; dropping message...");
     return nullptr;
   }

--- a/gfx/layers/ipc/CrossProcessCompositorBridgeParent.h
+++ b/gfx/layers/ipc/CrossProcessCompositorBridgeParent.h
@@ -140,18 +140,16 @@ public:
     // Not allowed.
     return nullptr;
   }
   bool DeallocPCompositorWidgetParent(PCompositorWidgetParent* aActor) override {
     // Not allowed.
     return false;
   }
 
-  virtual mozilla::ipc::IPCResult RecvGetCompositorOptions(const uint64_t& aLayersId, CompositorOptions* aOptions) override;
-
   virtual PAPZCTreeManagerParent* AllocPAPZCTreeManagerParent(const uint64_t& aLayersId) override;
   virtual bool DeallocPAPZCTreeManagerParent(PAPZCTreeManagerParent* aActor) override;
 
   virtual PAPZParent* AllocPAPZParent(const uint64_t& aLayersId) override;
   virtual bool DeallocPAPZParent(PAPZParent* aActor) override;
 
   virtual void UpdatePaintTime(LayerTransactionParent* aLayerTree, const TimeDuration& aPaintTime) override;
 

--- a/gfx/layers/ipc/PCompositorBridge.ipdl
+++ b/gfx/layers/ipc/PCompositorBridge.ipdl
@@ -139,19 +139,16 @@ parent:
   // Must be called before Initialize().
   async PCompositorWidget(CompositorWidgetInitData aInitData);
 
   // When out-of-process, this must be called to finish initialization.
   sync Initialize(uint64_t rootLayerTreeId);
   sync Reset(LayersBackend[] aBackendHints, uint64_t aSeqNo)
     returns (bool aResult, TextureFactoryIdentifier aOutIdentifier);
 
-  // Returns the CompositorOptions for this compositor.
-  sync GetCompositorOptions(uint64_t layersId) returns (CompositorOptions aOptions);
-
   // Must be called after Initialize(), and only succeeds if AsyncPanZoomEnabled() is true.
   async PAPZ(uint64_t layersId);
   async PAPZCTreeManager(uint64_t layersId);
 
   /**
    * Confirmation callback for UpdatePluginConfigurations and HideAllPlugins.
    */
   async RemotePluginsReady();

--- a/ipc/ipdl/sync-messages.ini
+++ b/ipc/ipdl/sync-messages.ini
@@ -975,18 +975,16 @@ description =
 [PAPZCTreeManager::ReceiveScrollWheelInputEvent]
 description =
 [PAPZCTreeManager::TransformEventRefPoint]
 description =
 [PCompositorBridge::Initialize]
 description =
 [PCompositorBridge::Reset]
 description =
-[PCompositorBridge::GetCompositorOptions]
-description =
 [PCompositorBridge::GetFrameUniformity]
 description =
 [PCompositorBridge::WillClose]
 description =
 [PCompositorBridge::Pause]
 description =
 [PCompositorBridge::Resume]
 description =