Add CCDelegatingRenderer, and corresponding IPCs

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index 3529de68e65298e5d04bc1d1d769111898b6421d..126414db9bc5b0db5937e909780cebff25910f31 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -35,6 +35,11 @@ namespace base {
 class TimeTicks;
 }
 
+namespace cc {
+struct CompositorFrame;
+struct CompositorFrameAck;
+}
+
 namespace ui {
 class KeyEvent;
 class Range;
@@ -406,6 +411,8 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
                                           int gpu_host_id);
 #endif
 
+  void SwapCompositorFrameAck(const cc::CompositorFrameAck& ack);
+
   // Signals that the compositing surface was updated, e.g. after a lost context
   // event.
   void CompositingSurfaceUpdated();
@@ -568,6 +575,7 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
                       bool last_unlocked_by_target,
                       bool privileged);
   void OnMsgUnlockMouse();
+  void OnMsgSwapCompositorFrame(const cc::CompositorFrame& frame);
 
 #if defined(OS_POSIX) || defined(USE_AURA)
   void OnMsgGetWindowRect(gfx::NativeViewId window_id, gfx::Rect* results);