Send vsync timebase updates to the browser compositor

ui/gl/gl_surface.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 "ui/gl/gl_surface.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 129 matching lines @@
 void* GLSurface::GetConfig() {
   NOTIMPLEMENTED();
   return NULL;
 }
 
 unsigned GLSurface::GetFormat() {
   NOTIMPLEMENTED();
   return 0;
 }
 
+bool GLSurface::GetVSyncParameters(base::TimeTicks* timebase,
+                                   base::TimeDelta* interval) {
+  return false;
+}
+
 GLSurface* GLSurface::GetCurrent() {
   return current_surface_.Pointer()->Get();
 }
 
 GLSurface::~GLSurface() {
   if (GetCurrent() == this)
     SetCurrent(NULL);
 }
 
 void GLSurface::SetCurrent(GLSurface* surface) {
@@ skipping 84 matching lines @@
 }
 
 void* GLSurfaceAdapter::GetConfig() {
   return surface_->GetConfig();
 }
 
 unsigned GLSurfaceAdapter::GetFormat() {
   return surface_->GetFormat();
 }
 
+bool GLSurfaceAdapter::GetVSyncParameters(base::TimeTicks* timebase,
+                                          base::TimeDelta* interval) {
+  return surface_->GetVSyncParameters(timebase, interval);
+}
+
 GLSurfaceAdapter::~GLSurfaceAdapter() {}
 
 }  // namespace gfx