Adding status to swap complete

ui/gl/gl_surface_osmesa.cc

 // 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.
 
 #include "base/logging.h"
 #include "base/numerics/safe_math.h"
 #include "third_party/mesa/src/include/GL/osmesa.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_surface_osmesa.h"
@@ skipping 66 matching lines @@
 
   size_ = new_size;
 
   return true;
 }
 
 bool GLSurfaceOSMesa::IsOffscreen() {
   return true;
 }
 
-bool GLSurfaceOSMesa::SwapBuffers() {
+gfx::SwapResult GLSurfaceOSMesa::SwapBuffers() {
   NOTREACHED() << "Should not call SwapBuffers on an GLSurfaceOSMesa.";
-  return false;
+  return gfx::SwapResult::SWAP_FAILED;
 }
 
 gfx::Size GLSurfaceOSMesa::GetSize() {
   return size_;
 }
 
 void* GLSurfaceOSMesa::GetHandle() {
   return buffer_.get();
 }
 
 unsigned GLSurfaceOSMesa::GetFormat() {
   return format_;
 }
 
 GLSurfaceOSMesa::~GLSurfaceOSMesa() {
   Destroy();
 }
 
 bool GLSurfaceOSMesaHeadless::IsOffscreen() { return false; }
 
-bool GLSurfaceOSMesaHeadless::SwapBuffers() { return true; }
+gfx::SwapResult GLSurfaceOSMesaHeadless::SwapBuffers() {
+  return gfx::SwapResult::SWAP_ACK;
+}
 
 GLSurfaceOSMesaHeadless::GLSurfaceOSMesaHeadless()
     : GLSurfaceOSMesa(OSMesaSurfaceFormatBGRA, gfx::Size(1, 1)) {
 }
 
 GLSurfaceOSMesaHeadless::~GLSurfaceOSMesaHeadless() { Destroy(); }
 
 }  // namespace gfx