Fix race conditions in window snapshot code.

content/browser/renderer_host/render_widget_host_view_gtk.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 "content/browser/renderer_host/render_widget_host_view_gtk.h"
 
 #include <cairo/cairo.h>
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gdk/gdkx.h>
@@ skipping 1048 matching lines @@
   return false;
 }
 
 void RenderWidgetHostViewGtk::AcceleratedSurfaceBuffersSwapped(
     const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
     int gpu_host_id) {
   AcceleratedSurfaceMsg_BufferPresented_Params ack_params;
   ack_params.sync_point = 0;
   RenderWidgetHostImpl::AcknowledgeBufferPresent(
       params.route_id, gpu_host_id, ack_params);
-  host_->FrameSwapped(params.latency_info);
+  RenderWidgetHostImpl::CompositorFrameDrawn(params.latency_info);
 }
 
 void RenderWidgetHostViewGtk::AcceleratedSurfacePostSubBuffer(
     const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params,
     int gpu_host_id) {
   AcceleratedSurfaceMsg_BufferPresented_Params ack_params;
   ack_params.sync_point = 0;
   RenderWidgetHostImpl::AcknowledgeBufferPresent(
       params.route_id, gpu_host_id, ack_params);
-  host_->FrameSwapped(params.latency_info);
+  RenderWidgetHostImpl::CompositorFrameDrawn(params.latency_info);
 }
 
 void RenderWidgetHostViewGtk::AcceleratedSurfaceSuspend() {
 }
 
 void RenderWidgetHostViewGtk::AcceleratedSurfaceRelease() {
 }
 
 bool RenderWidgetHostViewGtk::HasAcceleratedSurface(
       const gfx::Size& desired_size) {
@@ skipping 482 matching lines @@
     gfx::PluginWindowHandle id) {
   plugin_container_manager_.CreatePluginContainer(id);
 }
 
 void RenderWidgetHostViewGtk::OnDestroyPluginContainer(
     gfx::PluginWindowHandle id) {
   plugin_container_manager_.DestroyPluginContainer(id);
 }
 
 }  // namespace content