diff --git a/gfx/layers/Compositor.h b/gfx/layers/Compositor.h
index 97495ceb392e..8d8f54a8ce80 100644
--- a/gfx/layers/Compositor.h
+++ b/gfx/layers/Compositor.h
@@ -135,6 +135,7 @@ class CompositorD3D11;
 class BasicCompositor;
 class TextureHost;
 class TextureReadLock;
+class WebRenderCompositorOGL;
 
 enum SurfaceInitMode
 {
@@ -466,6 +467,7 @@ public:
   virtual CompositorD3D9* AsCompositorD3D9() { return nullptr; }
   virtual CompositorD3D11* AsCompositorD3D11() { return nullptr; }
   virtual BasicCompositor* AsBasicCompositor() { return nullptr; }
+  virtual WebRenderCompositorOGL* AsWebRenderCompositorOGL() { return nullptr; }
 
   /**
    * Each Compositor has a unique ID.
@@ -546,7 +548,7 @@ public:
     }
   }
 
-  void CompositeUntil(TimeStamp aTimeStamp) {
+  virtual void CompositeUntil(TimeStamp aTimeStamp) {
     if (mCompositeUntilTime.IsNull() ||
         mCompositeUntilTime < aTimeStamp) {
       mCompositeUntilTime = aTimeStamp;
diff --git a/gfx/layers/composite/CompositableHost.h b/gfx/layers/composite/CompositableHost.h
index d8a967732181..3f46ee7b9af8 100644
--- a/gfx/layers/composite/CompositableHost.h
+++ b/gfx/layers/composite/CompositableHost.h
@@ -239,6 +239,8 @@ public:
   /// is is destroyed.
   virtual void CleanupResources() {}
 
+  virtual void BindTextureSource() {}
+
 protected:
   TextureInfo mTextureInfo;
   uint64_t mAsyncID;
diff --git a/gfx/layers/composite/ImageHost.cpp b/gfx/layers/composite/ImageHost.cpp
index 841b12d9a727..6b793a116db3 100644
--- a/gfx/layers/composite/ImageHost.cpp
+++ b/gfx/layers/composite/ImageHost.cpp
@@ -433,6 +433,31 @@ ImageHost::Composite(LayerComposite* aLayer,
       mBias);
 }
 
+void
+ImageHost::BindTextureSource()
+{
+  int imageIndex = ChooseImageIndex();
+  if (imageIndex < 0) {
+    return;
+  }
+
+  if (uint32_t(imageIndex) + 1 < mImages.Length()) {
+    GetCompositor()->CompositeUntil(mImages[imageIndex + 1].mTimeStamp + TimeDuration::FromMilliseconds(BIAS_TIME_MS));
+  }
+
+  TimedImage* img = &mImages[imageIndex];
+  img->mTextureHost->SetCompositor(GetCompositor());
+  SetCurrentTextureHost(img->mTextureHost);
+
+  // XXX Add TextureSource binding
+
+  mBias = UpdateBias(
+      GetCompositor()->GetCompositionTime(), mImages[imageIndex].mTimeStamp,
+      uint32_t(imageIndex + 1) < mImages.Length() ?
+          mImages[imageIndex + 1].mTimeStamp : TimeStamp(),
+      mBias);
+}
+
 void
 ImageHost::SetCompositor(Compositor* aCompositor)
 {
diff --git a/gfx/layers/composite/ImageHost.h b/gfx/layers/composite/ImageHost.h
index 15064d210ef7..1b72976f2ea5 100644
--- a/gfx/layers/composite/ImageHost.h
+++ b/gfx/layers/composite/ImageHost.h
@@ -89,6 +89,8 @@ public:
 
   virtual void CleanupResources() override;
 
+  virtual void BindTextureSource() override;
+
   int32_t GetFrameID()
   {
     const TimedImage* img = ChooseImage();
diff --git a/gfx/layers/ipc/CompositorBridgeParent.cpp b/gfx/layers/ipc/CompositorBridgeParent.cpp
index 1e04868860d1..dce783010234 100644
--- a/gfx/layers/ipc/CompositorBridgeParent.cpp
+++ b/gfx/layers/ipc/CompositorBridgeParent.cpp
@@ -1552,7 +1552,7 @@ CompositorBridgeParent::AllocPWebRenderBridgeParent(const uint64_t& aPipelineId)
 
   RefPtr<gl::GLContext> glc(gl::GLContextProvider::CreateForCompositorWidget(mWidget, true));
   RefPtr<Compositor> compositor = new WebRenderCompositorOGL(glc.get());
-  WebRenderBridgeParent* parent = new WebRenderBridgeParent(nullptr, aPipelineId,
+  WebRenderBridgeParent* parent = new WebRenderBridgeParent(aPipelineId,
         mWidget, glc.get(), nullptr, compositor.get());
   parent->AddRef(); // IPDL reference
   MonitorAutoLock lock(*sIndirectLayerTreesLock);
diff --git a/gfx/layers/ipc/CrossProcessCompositorBridgeParent.cpp b/gfx/layers/ipc/CrossProcessCompositorBridgeParent.cpp
index 1bbb90bf2f3e..4a648dc1e3c0 100644
--- a/gfx/layers/ipc/CrossProcessCompositorBridgeParent.cpp
+++ b/gfx/layers/ipc/CrossProcessCompositorBridgeParent.cpp
@@ -212,7 +212,7 @@ CrossProcessCompositorBridgeParent::AllocPWebRenderBridgeParent(const uint64_t&
   WebRenderBridgeParent* root = sIndirectLayerTrees[cbp->RootLayerTreeId()].mWRBridge.get();
 
   WebRenderBridgeParent* parent = new WebRenderBridgeParent(
-    root, aPipelineId, nullptr, root->GLContext(), root->WindowState(), root->Compositor());
+    aPipelineId, nullptr, root->GLContext(), root->WindowState(), root->Compositor());
   parent->AddRef(); // IPDL reference
   sIndirectLayerTrees[aPipelineId].mWRBridge = parent;
 
diff --git a/gfx/layers/ipc/PWebRenderBridge.ipdl b/gfx/layers/ipc/PWebRenderBridge.ipdl
index 677059fc48a0..e76d92d39372 100644
--- a/gfx/layers/ipc/PWebRenderBridge.ipdl
+++ b/gfx/layers/ipc/PWebRenderBridge.ipdl
@@ -35,6 +35,8 @@ parent:
   sync DPSyncEnd(WebRenderCommand[] commands);
   sync DPGetSnapshot(uint32_t aWidth, uint32_t aHeight)
     returns (uint8_t[] aOutImageSnapshot);
+  async AddExternalImageId(uint64_t aImageId, uint64_t aAsyncContainerId);
+  async RemoveExternalImageId(uint64_t aImageId);
 
   async __delete__();
 };
diff --git a/gfx/layers/wr/WebRenderBridgeChild.cpp b/gfx/layers/wr/WebRenderBridgeChild.cpp
index f7746cfa66fc..a78e6acb89fd 100644
--- a/gfx/layers/wr/WebRenderBridgeChild.cpp
+++ b/gfx/layers/wr/WebRenderBridgeChild.cpp
@@ -51,5 +51,29 @@ WebRenderBridgeChild::DPEnd(bool aIsSync)
   mIsInTransaction = false;
 }
 
+uint64_t
+WebRenderBridgeChild::AllocExternalImageId(uint64_t aAsyncContainerID)
+{
+  static uint32_t sNextID = 1;
+  ++sNextID;
+  MOZ_RELEASE_ASSERT(sNextID != UINT32_MAX);
+
+  // XXX replace external image id allocation with webrender's id allocation.
+  // Use proc id as IdNamespace for now.
+  uint32_t procId = static_cast<uint32_t>(base::GetCurrentProcId());
+  uint64_t imageId = procId;
+  imageId = imageId << 32 | sNextID;
+
+  SendAddExternalImageId(imageId, aAsyncContainerID);
+  return imageId;
+}
+
+void
+WebRenderBridgeChild::DeallocExternalImageId(uint64_t aImageId)
+{
+  MOZ_ASSERT(aImageId);
+  SendRemoveExternalImageId(aImageId);
+}
+
 } // namespace layers
 } // namespace mozilla
diff --git a/gfx/layers/wr/WebRenderBridgeChild.h b/gfx/layers/wr/WebRenderBridgeChild.h
index 552b59b3cdc2..715510de7748 100644
--- a/gfx/layers/wr/WebRenderBridgeChild.h
+++ b/gfx/layers/wr/WebRenderBridgeChild.h
@@ -30,6 +30,9 @@ public:
 
   bool DPBegin(uint32_t aWidth, uint32_t aHeight);
   void DPEnd(bool aIsSync = false);
+
+  uint64_t AllocExternalImageId(uint64_t aAsyncContainerID);
+  void DeallocExternalImageId(uint64_t aImageId);
 protected:
   ~WebRenderBridgeChild() {}
 
diff --git a/gfx/layers/wr/WebRenderBridgeParent.cpp b/gfx/layers/wr/WebRenderBridgeParent.cpp
index 0310669f82b3..023c857a1e63 100644
--- a/gfx/layers/wr/WebRenderBridgeParent.cpp
+++ b/gfx/layers/wr/WebRenderBridgeParent.cpp
@@ -6,23 +6,23 @@
 
 #include "mozilla/layers/WebRenderBridgeParent.h"
 
+#include "CompositableHost.h"
 #include "GLContext.h"
 #include "GLContextProvider.h"
 #include "mozilla/layers/Compositor.h"
 #include "mozilla/layers/CompositorVsyncScheduler.h"
 #include "mozilla/widget/CompositorWidget.h"
+#include "mozilla/layers/WebRenderCompositorOGL.h"
 
 namespace mozilla {
 namespace layers {
 
-WebRenderBridgeParent::WebRenderBridgeParent(WebRenderBridgeParent* aParent,
-                                             const uint64_t& aPipelineId,
+WebRenderBridgeParent::WebRenderBridgeParent(const uint64_t& aPipelineId,
                                              widget::CompositorWidget* aWidget,
                                              gl::GLContext* aGlContext,
                                              wrwindowstate* aWrWindowState,
                                              layers::Compositor* aCompositor)
-  : mParent(aParent)
-  , mPipelineId(aPipelineId)
+  : mPipelineId(aPipelineId)
   , mWidget(aWidget)
   , mWRState(nullptr)
   , mGLContext(aGlContext)
@@ -40,6 +40,7 @@ WebRenderBridgeParent::WebRenderBridgeParent(WebRenderBridgeParent* aParent,
   }
   if (mWidget) {
     mCompositorScheduler = new CompositorVsyncScheduler(this, mWidget);
+    mCompositor->AsWebRenderCompositorOGL()->SetVsyncScheduler(mCompositorScheduler);
   }
 }
 
@@ -186,9 +187,48 @@ WebRenderBridgeParent::RecvDPGetSnapshot(const uint32_t& aWidth,
   return IPC_OK();
 }
 
+mozilla::ipc::IPCResult
+WebRenderBridgeParent::RecvAddExternalImageId(const uint64_t& aImageId,
+                                              const uint64_t& aAsyncContainerId)
+{
+  MOZ_ASSERT(!mExternalImageIds.Get(aImageId));
+
+  PCompositableParent* compositableParent = CompositableMap::Get(aAsyncContainerId);
+  if (!compositableParent) {
+    NS_ERROR("CompositableParent not found in the map");
+    return IPC_OK();
+  }
+
+  CompositableHost* host = CompositableHost::FromIPDLActor(compositableParent);
+  if (host->GetType() != CompositableType::IMAGE) {
+    NS_ERROR("Incompatible CompositableHost");
+    return IPC_OK();
+  }
+
+  host->SetCompositor(mCompositor);
+  mCompositor->AsWebRenderCompositorOGL()->AddExternalImageId(aImageId, host);
+  mExternalImageIds.Put(aImageId, aImageId);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult
+WebRenderBridgeParent::RecvRemoveExternalImageId(const uint64_t& aImageId)
+{
+  MOZ_ASSERT(mExternalImageIds.Get(aImageId));
+  mExternalImageIds.Remove(aImageId);
+  mCompositor->AsWebRenderCompositorOGL()->RemoveExternalImageId(aImageId);
+  return IPC_OK();
+}
+
 void
 WebRenderBridgeParent::ActorDestroy(ActorDestroyReason aWhy)
 {
+  for (auto iter = mExternalImageIds.Iter(); !iter.Done(); iter.Next()) {
+    uint64_t externalImageId = iter.Data();
+    mCompositor->AsWebRenderCompositorOGL()->RemoveExternalImageId(externalImageId);
+  }
+  mExternalImageIds.Clear();
+
   ClearResources();
 }
 
@@ -204,6 +244,7 @@ WebRenderBridgeParent::CompositeToTarget(gfx::DrawTarget* aTarget, const gfx::In
   }
 
   mCompositor->SetCompositionTime(TimeStamp::Now());
+  mCompositor->AsWebRenderCompositorOGL()->UpdateExternalImages();
 
   MOZ_ASSERT(mWRState);
   mozilla::widget::WidgetRenderingContext widgetContext;
@@ -235,11 +276,7 @@ WebRenderBridgeParent::DeleteOldImages()
 void
 WebRenderBridgeParent::ScheduleComposition()
 {
-  if (mCompositorScheduler) {
-    mCompositorScheduler->ScheduleComposition();
-  } else if (mParent) {
-    mParent->ScheduleComposition();
-  }
+  mCompositor->AsWebRenderCompositorOGL()->ScheduleComposition();
 }
 
 void
@@ -259,7 +296,6 @@ WebRenderBridgeParent::ClearResources()
     mCompositorScheduler = nullptr;
   }
   mGLContext = nullptr;
-  mParent = nullptr;
 }
 
 } // namespace layers
diff --git a/gfx/layers/wr/WebRenderBridgeParent.h b/gfx/layers/wr/WebRenderBridgeParent.h
index c80ddf568151..89df865c0361 100644
--- a/gfx/layers/wr/WebRenderBridgeParent.h
+++ b/gfx/layers/wr/WebRenderBridgeParent.h
@@ -33,8 +33,7 @@ class WebRenderBridgeParent final : public PWebRenderBridgeParent
   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WebRenderBridgeParent)
 
 public:
-  WebRenderBridgeParent(WebRenderBridgeParent* aParent,
-                        const uint64_t& aPipelineId,
+  WebRenderBridgeParent(const uint64_t& aPipelineId,
                         widget::CompositorWidget* aWidget,
                         gl::GLContext* aGlContext,
                         wrwindowstate* aWrWindowState,
@@ -68,6 +67,10 @@ public:
                                             const uint32_t& aHeight,
                                             InfallibleTArray<uint8_t>* aOutImageSnapshot) override;
 
+  mozilla::ipc::IPCResult RecvAddExternalImageId(const uint64_t& aImageId,
+                                                 const uint64_t& aAsyncContainerId) override;
+  mozilla::ipc::IPCResult RecvRemoveExternalImageId(const uint64_t& aImageId) override;
+
   void ActorDestroy(ActorDestroyReason aWhy) override;
 
   // CompositorVsyncSchedulerOwner
@@ -83,8 +86,6 @@ protected:
   void ClearResources();
 
 private:
-  // XXX remove mParent in Bug 1317935
-  RefPtr<WebRenderBridgeParent> mParent;
   uint64_t mPipelineId;
   RefPtr<widget::CompositorWidget> mWidget;
   wrstate* mWRState;
@@ -93,6 +94,7 @@ private:
   RefPtr<layers::Compositor> mCompositor;
   RefPtr<CompositorVsyncScheduler> mCompositorScheduler;
   std::vector<WRImageKey> mKeysToDelete;
+  nsDataHashtable<nsUint64HashKey, uint64_t> mExternalImageIds;
 };
 
 } // namespace layers
diff --git a/gfx/layers/wr/WebRenderCompositorOGL.cpp b/gfx/layers/wr/WebRenderCompositorOGL.cpp
index c4b02bd2eb6d..7c386ef4bd60 100644
--- a/gfx/layers/wr/WebRenderCompositorOGL.cpp
+++ b/gfx/layers/wr/WebRenderCompositorOGL.cpp
@@ -5,8 +5,10 @@
 
 #include "WebRenderCompositorOGL.h"
 
+#include "CompositableHost.h"
 #include "GLContext.h"                  // for GLContext
 #include "GLUploadHelpers.h"
+#include "mozilla/layers/CompositorVsyncScheduler.h"
 #include "mozilla/layers/TextureHost.h"  // for TextureSource, etc
 #include "mozilla/layers/TextureHostOGL.h"  // for TextureSourceOGL, etc
 
@@ -35,6 +37,9 @@ WebRenderCompositorOGL::Destroy()
 {
   Compositor::Destroy();
 
+  mCompositableHosts.Clear();
+  mCompositorScheduler = nullptr;
+
   if (!mDestroyed) {
     mDestroyed = true;
     mGLContext = nullptr;;
@@ -80,5 +85,53 @@ WebRenderCompositorOGL::MakeCurrent(MakeCurrentFlags aFlags) {
   mGLContext->MakeCurrent(aFlags & ForceMakeCurrent);
 }
 
+void
+WebRenderCompositorOGL::CompositeUntil(TimeStamp aTimeStamp)
+{
+  Compositor::CompositeUntil(aTimeStamp);
+  // We're not really taking advantage of the stored composite-again-time here.
+  // We might be able to skip the next few composites altogether. However,
+  // that's a bit complex to implement and we'll get most of the advantage
+  // by skipping compositing when we detect there's nothing invalid. This is why
+  // we do "composite until" rather than "composite again at".
+  ScheduleComposition();
+}
+
+void
+WebRenderCompositorOGL::AddExternalImageId(uint64_t aExternalImageId, CompositableHost* aHost)
+{
+  MOZ_ASSERT(!mCompositableHosts.Get(aExternalImageId));
+  mCompositableHosts.Put(aExternalImageId, aHost);
+}
+
+void
+WebRenderCompositorOGL::RemoveExternalImageId(uint64_t aExternalImageId)
+{
+  MOZ_ASSERT(mCompositableHosts.Get(aExternalImageId));
+  mCompositableHosts.Remove(aExternalImageId);
+}
+
+void
+WebRenderCompositorOGL::UpdateExternalImages()
+{
+  for (auto iter = mCompositableHosts.Iter(); !iter.Done(); iter.Next()) {
+    RefPtr<CompositableHost>& host = iter.Data();
+    // XXX Change to correct TextrueSource handling here.
+    host->BindTextureSource();
+  }
+}
+
+void
+WebRenderCompositorOGL::ScheduleComposition()
+{
+  mCompositorScheduler->ScheduleComposition();
+}
+
+void
+WebRenderCompositorOGL::SetVsyncScheduler(CompositorVsyncScheduler* aScheduler)
+{
+  mCompositorScheduler = aScheduler;
+}
+
 } // namespace layers
 } // namespace mozilla
diff --git a/gfx/layers/wr/WebRenderCompositorOGL.h b/gfx/layers/wr/WebRenderCompositorOGL.h
index eb384c6f4f4f..ab0e55266c78 100644
--- a/gfx/layers/wr/WebRenderCompositorOGL.h
+++ b/gfx/layers/wr/WebRenderCompositorOGL.h
@@ -9,10 +9,14 @@
 #include "GLContextTypes.h"             // for GLContext, etc
 #include "GLDefs.h"                     // for GLuint, LOCAL_GL_TEXTURE_2D, etc
 #include "mozilla/layers/Compositor.h"  // for SurfaceInitMode, Compositor, etc
+#include "nsDataHashtable.h"
 
 namespace mozilla {
 namespace layers {
 
+class CompositableHost;
+class CompositorVsyncScheduler;
+
 class WebRenderCompositorOGL final : public Compositor
 {
   typedef mozilla::gl::GLContext GLContext;
@@ -24,6 +28,8 @@ protected:
   virtual ~WebRenderCompositorOGL();
 
 public:
+  virtual WebRenderCompositorOGL* AsWebRenderCompositorOGL() override { return this; }
+
   virtual already_AddRefed<DataTextureSource>
   CreateDataTextureSource(TextureFlags aFlags = TextureFlags::NO_FLAGS) override;
 
@@ -106,10 +112,21 @@ public:
 
   virtual bool IsValid() const override { return true; }
 
+  virtual void CompositeUntil(TimeStamp aTimeStamp) override;
+
   GLContext* gl() const { return mGLContext; }
 
+  void AddExternalImageId(uint64_t aExternalImageId, CompositableHost* aHost);
+  void RemoveExternalImageId(uint64_t aExternalImageId);
+  void UpdateExternalImages();
+
+  void ScheduleComposition();
+  void SetVsyncScheduler(CompositorVsyncScheduler* aScheduler);
 private:
   RefPtr<GLContext> mGLContext;
+  RefPtr<CompositorVsyncScheduler> mCompositorScheduler;
+  // Holds CompositableHosts that are bound to external image ids.
+  nsDataHashtable<nsUint64HashKey, RefPtr<CompositableHost> > mCompositableHosts;
 
   bool mDestroyed;
 };
diff --git a/gfx/layers/wr/WebRenderImageLayer.cpp b/gfx/layers/wr/WebRenderImageLayer.cpp
index a2325f904b2b..b10cae5d129e 100644
--- a/gfx/layers/wr/WebRenderImageLayer.cpp
+++ b/gfx/layers/wr/WebRenderImageLayer.cpp
@@ -13,6 +13,14 @@ namespace layers {
 
 using namespace gfx;
 
+WebRenderImageLayer::~WebRenderImageLayer()
+{
+  MOZ_COUNT_DTOR(WebRenderImageLayer);
+  if (mImageId) {
+    WRBridge()->DeallocExternalImageId(mImageId);
+  }
+}
+
 already_AddRefed<gfx::SourceSurface>
 WebRenderImageLayer::GetAsSourceSurface()
 {
@@ -31,6 +39,12 @@ WebRenderImageLayer::GetAsSourceSurface()
 void
 WebRenderImageLayer::RenderLayer()
 {
+  // XXX update async ImageContainer rendering path
+  if (mContainer->IsAsync() && !mImageId) {
+    mImageId = WRBridge()->AllocExternalImageId(mContainer->GetAsyncContainerID());
+    MOZ_ASSERT(mImageId);
+  }
+
   RefPtr<gfx::SourceSurface> surface = GetAsSourceSurface();
   if (!surface)
     return;
diff --git a/gfx/layers/wr/WebRenderImageLayer.h b/gfx/layers/wr/WebRenderImageLayer.h
index 86e19d2dce05..18773c24b9e9 100644
--- a/gfx/layers/wr/WebRenderImageLayer.h
+++ b/gfx/layers/wr/WebRenderImageLayer.h
@@ -17,16 +17,14 @@ class WebRenderImageLayer : public WebRenderLayer,
 public:
   explicit WebRenderImageLayer(WebRenderLayerManager* aLayerManager)
     : ImageLayer(aLayerManager, static_cast<WebRenderLayer*>(this))
+    , mImageId(0)
   {
     MOZ_COUNT_CTOR(WebRenderImageLayer);
   }
 
   virtual already_AddRefed<gfx::SourceSurface> GetAsSourceSurface() override;
 protected:
-  virtual ~WebRenderImageLayer()
-  {
-    MOZ_COUNT_DTOR(WebRenderImageLayer);
-  }
+  virtual ~WebRenderImageLayer();
 
   WebRenderLayerManager* Manager()
   {
@@ -36,6 +34,9 @@ protected:
 public:
   Layer* GetLayer() override { return this; }
   void RenderLayer() override;
+
+protected:
+  uint64_t mImageId;
 };
 
 } // namespace layers