Fix handling of Mac accelerated plugin layers across tab switch.

chrome/browser/renderer_host/accelerated_surface_container_manager_mac.h

 // 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.
 
 #ifndef CHROME_BROWSER_RENDERER_HOST_GPU_PLUGIN_CONTAINER_MANAGER_MAC_H_
 #define CHROME_BROWSER_RENDERER_HOST_GPU_PLUGIN_CONTAINER_MANAGER_MAC_H_
 
 #include <OpenGL/OpenGL.h>
 #include <map>
 #include <vector>
@@ skipping 35 matching lines @@
                               TransportDIB::Handle transport_dib);
 
   // Takes an update from WebKit about a plugin's position and size and moves
   // the plugin accordingly.
   void MovePluginContainer(const webkit_glue::WebPluginGeometry& move);
 
   // Draws all of the managed plugin containers into the given OpenGL
   // context, which must already be current.
   void Draw(CGLContextObj context);
 
+  // Causes the next Draw call on each container to trigger a texture upload.
+  // Should be called any time the drawing context has changed.
+  void ForceTextureReload();
+
   // Called by the container to enqueue its OpenGL texture objects for
   // deletion.
   void EnqueueTextureForDeletion(GLuint texture);
 
  private:
   uint32 current_id_;
 
   // Maps a "fake" plugin window handle to the corresponding container.
   AcceleratedSurfaceContainerMac* MapIDToContainer(gfx::PluginWindowHandle id);
 
   // A map that associates plugin window handles with their containers.
   typedef std::map<gfx::PluginWindowHandle, AcceleratedSurfaceContainerMac*>
       PluginWindowToContainerMap;
   PluginWindowToContainerMap plugin_window_to_container_map_;
 
   // A list of OpenGL textures waiting to be deleted
   std::vector<GLuint> textures_pending_deletion_;
 
   DISALLOW_COPY_AND_ASSIGN(AcceleratedSurfaceContainerManagerMac);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_GPU_PLUGIN_CONTAINER_MANAGER_MAC_H_