Split ThreadProxy methods to ProxyMain and ProxyImpl.

cc/trees/proxy_impl.h

Index: cc/trees/proxy_impl.h
diff --git a/cc/trees/proxy_impl.h b/cc/trees/proxy_impl.h
index 998463f76692a987a5e5028731bc69376403eacf..000b601648931ec66d70a5c4eefc03a16c87d4be 100644
--- a/cc/trees/proxy_impl.h
+++ b/cc/trees/proxy_impl.h
@@ -7,9 +7,9 @@
 
 #include "base/memory/weak_ptr.h"
 #include "cc/base/cc_export.h"
+#include "cc/output/output_surface.h"
 
 namespace cc {
-
 // TODO(khushalsagar): The impl side of ThreadProxy. It is currently defined as
 // an interface with the implementation provided by ThreadProxy and will be
 // made an independent class.
@@ -20,6 +20,16 @@ class CC_EXPORT ProxyImpl {
  public:
   // Callback for impl side commands received from the channel.
   virtual void SetThrottleFrameProductionOnImpl(bool throttle) = 0;
+  virtual void InitializeOutputSurfaceOnImpl(OutputSurface* output_surface) = 0;
+  virtual void MainThreadHasStoppedFlingingOnImpl() = 0;
+  virtual void SetInputThrottledUntilCommitOnImpl(bool is_throttled) = 0;
+  virtual void SetDeferCommitsOnImpl(bool defer_commits) = 0;
+  virtual void FinishAllRenderingOnImpl() = 0;
+  virtual void SetVisibleOnImpl(bool visible) = 0;
+  virtual void ReleaseOutputSurfaceOnImpl() = 0;
+  virtual void FinishGLOnImpl() = 0;
+  virtual void MainFrameWillHappenOnImplForTesting(
+      bool* main_frame_will_happen) = 0;
 
   // TODO(khushalsagar): Rename as GetWeakPtr() once ThreadProxy is split.
   virtual base::WeakPtr<ProxyImpl> GetImplWeakPtr() = 0;