Add flow control between renderer and GPU processes, and, on Mac OS X,...

chrome/browser/renderer_host/accelerated_surface_container_manager_mac.cc

 // Copyright (c) 2010 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 "chrome/browser/renderer_host/accelerated_surface_container_manager_mac.h"
 
 #include "base/logging.h"
 #include "chrome/browser/renderer_host/accelerated_surface_container_mac.h"
 #include "webkit/glue/plugins/webplugin.h"
 
@@ skipping 82 matching lines @@
   if (container)
     container->SetGeometry(move);
 }
 
 void AcceleratedSurfaceContainerManagerMac::Draw(CGLContextObj context,
                                                  gfx::PluginWindowHandle id) {
   AutoLock lock(lock_);
 
   glColorMask(true, true, true, true);
   // Should match the clear color of RenderWidgetHostViewMac.
-  glClearColor(255, 255, 255, 255);
+  glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
   // TODO(thakis): Clearing the whole color buffer is wasteful, since most of
   // it is overwritten by the surface.
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   glDisable(GL_DEPTH_TEST);
   glDisable(GL_BLEND);
 
   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 
   AcceleratedSurfaceContainerMac* container = MapIDToContainer(id);
   CHECK(container);
@@ skipping 50 matching lines @@
         gfx::PluginWindowHandle id) const {
   PluginWindowToContainerMap::const_iterator i =
       plugin_window_to_container_map_.find(id);
   if (i != plugin_window_to_container_map_.end())
     return i->second;
 
   LOG(ERROR) << "Request for plugin container for unknown window id " << id;
 
   return NULL;
 }