sync compostor: Return resources async IPC

content/renderer/android/synchronous_compositor_output_surface.h

Index: content/renderer/android/synchronous_compositor_output_surface.h
diff --git a/content/renderer/android/synchronous_compositor_output_surface.h b/content/renderer/android/synchronous_compositor_output_surface.h
index 01315b8ebb5122cc848e1a87c9fa1fc58ec43637..87a2fa6bd3ca574cc63d9f45126025b2f7273d35 100644
--- a/content/renderer/android/synchronous_compositor_output_surface.h
+++ b/content/renderer/android/synchronous_compositor_output_surface.h
@@ -68,6 +68,7 @@ class SynchronousCompositorOutputSurface
   ~SynchronousCompositorOutputSurface() override;
 
   void SetSyncClient(SynchronousCompositorOutputSurfaceClient* compositor);
+  bool OnMessageReceived(const IPC::Message& message);
 
   // OutputSurface.
   bool BindToClient(cc::OutputSurfaceClient* surface_client) override;
@@ -85,18 +86,12 @@ class SynchronousCompositorOutputSurface
                     const gfx::Rect& clip,
                     const gfx::Rect& viewport_rect_for_tile_priority,
                     const gfx::Transform& transform_for_tile_priority);
-  void ReturnResources(uint32_t output_surface_id,
-                       const cc::CompositorFrameAck& frame_ack);
   void DemandDrawSw(SkCanvas* canvas);
   void SetMemoryPolicy(size_t bytes_limit);
   void SetTreeActivationCallback(const base::Closure& callback);
   void GetMessagesToDeliver(
       std::vector<std::unique_ptr<IPC::Message>>* messages);
 
-  size_t GetMemoryPolicy() const {

[hush (inactive), 2016/05/09 23:52:10]

so... this function is not used by anybody?

[boliu, 2016/05/10 00:00:45]

nope

-    return memory_policy_.bytes_limit_when_visible;
-  }
-
  private:
   class SoftwareDevice;
   friend class SoftwareDevice;
@@ -110,6 +105,10 @@ class SynchronousCompositorOutputSurface
   void CancelFallbackTick();
   void FallbackTickFired();
 
+  // IPC handlers.
+  void OnReclaimResources(uint32_t output_surface_id,
+                          const cc::CompositorFrameAck& ack);
+
   const int routing_id_;
   const uint32_t output_surface_id_;
   SynchronousCompositorRegistry* const registry_;  // unowned