Enqueuing new frames in a Surface should cause Displays to reaggregate it

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 afe2b39ada6d3bb0147eecdb2edcd1ed9180733d..58d76e55af36bbfbf8776188bfcc29eb5a3d7a98 100644
--- a/content/browser/compositor/onscreen_display_client.h
+++ b/content/browser/compositor/onscreen_display_client.h
@@ -9,6 +9,7 @@
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/single_thread_task_runner.h"
 #include "cc/surfaces/display.h"
 
 namespace cc {
@@ -25,18 +26,26 @@ class OnscreenDisplayClient : cc::DisplayClient {
   OnscreenDisplayClient(
       const scoped_refptr<cc::ContextProvider>& onscreen_context_provider,
       scoped_ptr<cc::OutputSurface> software_surface,
-      cc::SurfaceManager* manager);
+      cc::SurfaceManager* manager,
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner);
   virtual ~OnscreenDisplayClient();
 
   cc::Display* display() { return display_.get(); }
 
   // cc::DisplayClient implementation.
   virtual scoped_ptr<cc::OutputSurface> CreateOutputSurface() OVERRIDE;
+  virtual void DisplayDamaged() OVERRIDE;
 
  private:
+  void Draw();
+
   scoped_refptr<cc::ContextProvider> onscreen_context_provider_;
   scoped_ptr<cc::OutputSurface> software_surface_;
   scoped_ptr<cc::Display> display_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+  bool scheduled_draw_;
+
+  base::WeakPtrFactory<OnscreenDisplayClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OnscreenDisplayClient);
 };