Integrate VDA with WebRTC.

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index be9b17617b5d640074bd1b216232a9ef2acf2184..a9fb1b2fa2e7b0f915eb64625b30089b6718f724 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -82,6 +82,7 @@ class MediaStreamCenter;
 class MediaStreamDependencyFactory;
 class P2PSocketDispatcher;
 class PeerConnectionTracker;
+class RendererGpuVideoDecoderFactories;
 class RendererWebKitPlatformSupportImpl;
 class RenderProcessObserver;
 class VideoCaptureImplManager;
@@ -277,6 +278,10 @@ class CONTENT_EXPORT RenderThreadImpl : public RenderThread,
   // not sent for at least one notification delay.
   void PostponeIdleNotification();
 
+  // Gets a RendererGpuVideoDecoderFactories. Returns NULL if VDA is disabled or
+  // a graphics context cannot be obtained.
+  RendererGpuVideoDecoderFactories* GetGpuFactories();
+
   // Returns a graphics context shared among all
   // RendererGpuVideoDecoderFactories, or NULL on error.  Context remains owned
   // by this class and must be null-tested before each use to detect context