cc: Update Main RendererCapabilities on DeferredInitialize

cc/trees/thread_proxy.h

Index: cc/trees/thread_proxy.h
diff --git a/cc/trees/thread_proxy.h b/cc/trees/thread_proxy.h
index 2fb1263882eacb248c20bc5730236ba5f6a54b61..ee12ce459e6faa750da07ab64c047934e6bd60d0 100644
--- a/cc/trees/thread_proxy.h
+++ b/cc/trees/thread_proxy.h
@@ -71,6 +71,7 @@ class ThreadProxy : public Proxy,
   virtual scoped_ptr<base::Value> SchedulerStateAsValueForTesting() OVERRIDE;
 
   // LayerTreeHostImplClient implementation
+  virtual void UpdateRendererCapabilitiesOnImplThread() OVERRIDE;
   virtual void DidLoseOutputSurfaceOnImplThread() OVERRIDE;
   virtual void DidSwapBuffersOnImplThread() OVERRIDE {}
   virtual void OnSwapBuffersCompleteOnImplThread() OVERRIDE;
@@ -139,6 +140,8 @@ class ThreadProxy : public Proxy,
   };
 
   // Called on main thread.
+  void SetRendererCapabilitiesMainThreadCopy(
+      const RendererCapabilities& capabilities);
   void BeginMainFrame(
       scoped_ptr<BeginMainFrameAndCommitState> begin_main_frame_state);
   void DidCommitAndDrawFrame();
@@ -163,7 +166,8 @@ class ThreadProxy : public Proxy,
   void StartCommitOnImplThread(
       CompletionEvent* completion,
       ResourceUpdateQueue* queue,
-      scoped_refptr<ContextProvider> offscreen_context_provider);
+      scoped_refptr<ContextProvider> offscreen_context_provider,
+      const RendererCapabilities& main_frame_renderer_caps);
   void BeginMainFrameAbortedOnImplThread(bool did_handle);
   void RequestReadbackOnImplThread(ReadbackRequest* request);
   void FinishAllRenderingOnImplThread(CompletionEvent* completion);
@@ -275,6 +279,10 @@ class ThreadProxy : public Proxy,
     // Set when the main thread is waiting on a commit to complete.
     CompletionEvent* commit_completion_event;
 
+    // The main renderer capabilities used for this commit. used to check
+    // for renderer capability staleness.
+    RendererCapabilities renderer_capabilities_for_commit;
+
     // Set when the main thread is waiting on a pending tree activation.
     CompletionEvent* completion_event_for_commit_held_on_tree_activation;