Limit outstanding surface draw swaps to max_frames_pending.

mojo/services/surfaces/surfaces_impl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_SERVICES_SURFACES_SURFACES_IMPL_H_
 #define MOJO_SERVICES_SURFACES_SURFACES_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "cc/surfaces/display_client.h"
 #include "cc/surfaces/surface_factory.h"
@@ skipping 34 matching lines @@
                                        SurfaceIdPtr id,
                                        mojo::SizePtr size) OVERRIDE;
 
   // SurfaceFactoryClient implementation.
   virtual void ReturnResources(
       const cc::ReturnedResourceArray& resources) OVERRIDE;
 
   // DisplayClient implementation.
   virtual scoped_ptr<cc::OutputSurface> CreateOutputSurface() OVERRIDE;
   virtual void DisplayDamaged() OVERRIDE;
+  virtual void DidSwapBuffers() OVERRIDE;
+  virtual void DidSwapBuffersComplete() OVERRIDE;
 
   cc::SurfaceFactory* factory() { return &factory_; }
 
  private:
   cc::SurfaceManager* manager_;
   cc::SurfaceFactory factory_;
   uint32_t id_namespace_;
   Client* client_;
   scoped_ptr<cc::Display> display_;
   ScopedMessagePipeHandle command_buffer_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfacesImpl);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_SURFACES_SURFACES_IMPL_H_