Adding status to swap complete

ui/gl/gl_surface.h

 // Copyright (c) 2012 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 UI_GL_GL_SURFACE_H_
 #define UI_GL_GL_SURFACE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 55 matching lines @@
   // Get the underlying platform specific surface "handle".
   virtual void* GetHandle() = 0;
 
   // Returns whether or not the surface supports PostSubBuffer.
   virtual bool SupportsPostSubBuffer();
 
   // Returns the internal frame buffer object name if the surface is backed by
   // FBO. Otherwise returns 0.
   virtual unsigned int GetBackingFrameBufferObject();
 
-  typedef base::Callback<void()> SwapCompletionCallback;
+  typedef base::Callback<void(int)> SwapCompletionCallback;
   // Swaps front and back buffers. This has no effect for off-screen
   // contexts. On some platforms, we want to send SwapBufferAck only after the
   // surface is displayed on screen. The callback can be used to delay sending
   // SwapBufferAck till that data is available. The callback should be run on
   // the calling thread (i.e. same thread SwapBuffersAsync is called)
   virtual bool SwapBuffersAsync(const SwapCompletionCallback& callback);
 
   // Copy part of the backbuffer to the frontbuffer.
   virtual bool PostSubBuffer(int x, int y, int width, int height);
 
@@ skipping 151 matching lines @@
 
  private:
   scoped_refptr<GLSurface> surface_;
 
   DISALLOW_COPY_AND_ASSIGN(GLSurfaceAdapter);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_SURFACE_H_