Adding status to swap complete

content/common/gpu/image_transport_surface_mac.mm

 // 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.
 
 #include "content/common/gpu/image_transport_surface.h"
 
 #include "content/common/gpu/gpu_messages.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_implementation.h"
@@ skipping 10 matching lines @@
 
 // A subclass of GLSurfaceOSMesa that doesn't print an error message when
 // SwapBuffers() is called.
 class DRTSurfaceOSMesa : public gfx::GLSurfaceOSMesa {
  public:
   // Size doesn't matter, the surface is resized to the right size later.
   DRTSurfaceOSMesa()
       : GLSurfaceOSMesa(gfx::OSMesaSurfaceFormatRGBA, gfx::Size(1, 1)) {}
 
   // Implement a subset of GLSurface.
-  bool SwapBuffers() override;
+  gfx::SwapResult SwapBuffers() override;
 
  private:
   ~DRTSurfaceOSMesa() override {}
   DISALLOW_COPY_AND_ASSIGN(DRTSurfaceOSMesa);
 };
 
-bool DRTSurfaceOSMesa::SwapBuffers() {
-  return true;
+gfx::SwapResult DRTSurfaceOSMesa::SwapBuffers() {
+  return gfx::SwapResult::SWAP_ACK;
 }
 
 bool g_allow_os_mesa = false;
 
 }  //  namespace
 
 // static
 scoped_refptr<gfx::GLSurface> ImageTransportSurface::CreateNativeSurface(
     GpuChannelManager* manager,
     GpuCommandBufferStub* stub,
@@ skipping 22 matching lines @@
           manager, stub, surface.get()));
   }
 }
 
 // static
 void ImageTransportSurface::SetAllowOSMesaForTesting(bool allow) {
   g_allow_os_mesa = allow;
 }
 
 }  // namespace content