Add LayerTreeHostSettings for synchronous compositor

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 73 matching lines @@
       new RenderWidgetCompositor(widget));
 
   CommandLine* cmd = CommandLine::ForCurrentProcess();
 
   cc::LayerTreeSettings settings;
   settings.accelerate_painting =
       cmd->HasSwitch(switches::kEnableAcceleratedPainting);
   settings.render_vsync_enabled = !cmd->HasSwitch(switches::kDisableGpuVsync);
   settings.render_vsync_notification_enabled =
       cmd->HasSwitch(switches::kEnableVsyncNotification);
+  settings.synchronously_disable_vsync = widget->SynchronouslyDisableVSync();
   settings.per_tile_painting_enabled =
       cmd->HasSwitch(cc::switches::kEnablePerTilePainting);
   settings.accelerated_animation_enabled =
       !cmd->HasSwitch(cc::switches::kDisableThreadedAnimation);
 
   int default_tile_width = settings.default_tile_size.width();
   if (cmd->HasSwitch(switches::kDefaultTileWidth)) {
     GetSwitchValueAsInt(*cmd, switches::kDefaultTileWidth, 1,
                         std::numeric_limits<int>::max(), &default_tile_width);
   }
@@ skipping 454 matching lines @@
   return RenderThreadImpl::current()->OffscreenContextProviderForMainThread();
 }
 
 scoped_refptr<cc::ContextProvider>
 RenderWidgetCompositor::OffscreenContextProviderForCompositorThread() {
   return RenderThreadImpl::current()->
       OffscreenContextProviderForCompositorThread();
 }
 
 }  // namespace content