Support distributing vsync info with surfaces.

content/browser/compositor/onscreen_display_client.h

Index: content/browser/compositor/onscreen_display_client.h
diff --git a/content/browser/compositor/onscreen_display_client.h b/content/browser/compositor/onscreen_display_client.h
index 7dc073cf9e951b58e5e64e021fbacaabaa6fe68d..930addd13379cff762db81e4e6bec37eb7ff4c28 100644
--- a/content/browser/compositor/onscreen_display_client.h
+++ b/content/browser/compositor/onscreen_display_client.h
@@ -18,6 +18,7 @@ class SurfaceManager;
 }
 
 namespace content {
+class SurfaceDisplayOutputSurface;
 
 // This class provides a DisplayClient implementation for drawing directly to an
 // onscreen context.
@@ -30,10 +31,15 @@ class OnscreenDisplayClient : cc::DisplayClient {
   virtual ~OnscreenDisplayClient();
 
   cc::Display* display() { return display_.get(); }
+  void set_surface_output_surface(SurfaceDisplayOutputSurface* surface) {

[jamesr, 2014/09/17 05:47:11]

there's a tongue twister

+    surface_display_output_surface_ = surface;
+  }
 
   // cc::DisplayClient implementation.
   virtual scoped_ptr<cc::OutputSurface> CreateOutputSurface() OVERRIDE;
   virtual void DisplayDamaged() OVERRIDE;
+  virtual void CommitVSyncParameters(base::TimeTicks timebase,
+                                     base::TimeDelta interval) OVERRIDE;
 
  private:
   void Draw();
@@ -41,6 +47,7 @@ class OnscreenDisplayClient : cc::DisplayClient {
   scoped_ptr<cc::OutputSurface> output_surface_;
   scoped_ptr<cc::Display> display_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+  SurfaceDisplayOutputSurface* surface_display_output_surface_;
   bool scheduled_draw_;
 
   base::WeakPtrFactory<OnscreenDisplayClient> weak_ptr_factory_;