Adding status to swap complete

content/common/gpu/null_transport_surface.cc

 // Copyright (c) 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/null_transport_surface.h"
 
 #include "base/command_line.h"
 #include "content/common/gpu/gpu_channel.h"
 #include "content/common/gpu/gpu_channel_manager.h"
 #include "content/common/gpu/gpu_command_buffer_stub.h"
@@ skipping 31 matching lines @@
       GetHelper()->SetPreemptByFlag(parent_channel->GetPreemptionFlag());
   }
 
   return true;
 }
 
 void NullTransportSurface::Destroy() {
   // Do not destroy |surface_| since we use the shared offscreen surface.
 }
 
-bool NullTransportSurface::SwapBuffers() {
+gfx::SwapResult NullTransportSurface::SwapBuffers() {
   NOTIMPLEMENTED();
-  return false;
+  return gfx::SWAP_FAILED;
 }
 
-bool NullTransportSurface::PostSubBuffer(
-    int x, int y, int width, int height) {
+gfx::SwapResult NullTransportSurface::PostSubBuffer(int x,
+                                                    int y,
+                                                    int width,
+                                                    int height) {
   NOTIMPLEMENTED();
-  return false;
+  return gfx::SWAP_FAILED;
 }
 
 void NullTransportSurface::SendVSyncUpdateIfAvailable() {
   NOTREACHED();
 }
 
 bool NullTransportSurface::OnMakeCurrent(gfx::GLContext* context) {
   // Override PassThroughImageTransportSurface default behavior which
   // sets the swap interval.
   return true;
 }
 
 }  // namespace content