Implement "iframe shim" behavior for windowed plugins....

chrome/common/plugin_messages_internal.h

 // Copyright (c) 2006-2008 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 "base/shared_memory.h"
 #include "chrome/common/ipc_message_macros.h"
 #include "webkit/glue/webcursor.h"
 
 //-----------------------------------------------------------------------------
 // PluginProcess messages
@@ skipping 106 matching lines @@
                              int /* route_id */,
                              void* /* npobject_ptr */)
 
   IPC_SYNC_MESSAGE_ROUTED1_0(PluginMsg_DidFinishLoadWithReason,
                              int /* reason */)
 
   // Updates the plugin location.  For windowless plugins, windowless_buffer
   // contains a buffer that the plugin draws into.  background_buffer is used
   // for transparent windowless plugins, and holds the background of the plugin
   // rectangle.
-  IPC_MESSAGE_ROUTED5(PluginMsg_UpdateGeometry,
+  IPC_MESSAGE_ROUTED6(PluginMsg_UpdateGeometry,
                       gfx::Rect /* window_rect */,
                       gfx::Rect /* clip_rect */,
+                      std::vector<gfx::Rect> /* cutout_rects */,
                       bool /* visible */,
                       SharedMemoryHandle /* windowless_buffer */,
                       SharedMemoryHandle /* background_buffer */)
 
   IPC_SYNC_MESSAGE_ROUTED0_0(PluginMsg_SetFocus)
 
   IPC_SYNC_MESSAGE_ROUTED1_2(PluginMsg_HandleEvent,
                              NPEvent /* event */,
                              bool /* handled */,
                              WebCursor /* cursor type*/)
@@ skipping 164 matching lines @@
   IPC_SYNC_MESSAGE_ROUTED1_2(NPObjectMsg_Evaluate,
                              std::string /* script */,
                              NPVariant_Param /* result_param */,
                              bool /* result */)
 
   IPC_SYNC_MESSAGE_ROUTED1_0(NPObjectMsg_SetException,
                              std::string /* message */)
 
 IPC_END_MESSAGES(NPObject)