Use inner HWND for accelerated rendering on windows

chrome/common/render_messages_internal.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.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <map>
 #include <string>
@@ skipping 1297 matching lines @@
   // the tag sent along with ViewMsg_PaintAtSize.
   IPC_MESSAGE_ROUTED2(ViewHostMsg_PaintAtSize_ACK,
                       int /* tag */,
                       gfx::Size /* size */)
 
   // Sent to update part of the view.  In response to this message, the host
   // generates a ViewMsg_UpdateRect_ACK message.
   IPC_MESSAGE_ROUTED1(ViewHostMsg_UpdateRect,
                       ViewHostMsg_UpdateRect_Params)
 
-  // Sent by the renderer when GPU compositing is enabled or disabled to notify
-  // the browser whether or not is should do paiting.
-  IPC_MESSAGE_ROUTED1(ViewHostMsg_GpuRenderingActivated,
-                      bool /* true if the GPU process renders to window */)
+  // Sent by the renderer when accelerated compositing is enabled or disabled to
+  // notify the browser whether or not is should do painting.
+  IPC_MESSAGE_ROUTED1(ViewHostMsg_DidActivateAcceleratedCompositing,
+                      bool /* true if the accelerated compositor is actve */)
 
   // Acknowledges receipt of a ViewMsg_HandleInputEvent message.
   // Payload is a WebInputEvent::Type which is the type of the event, followed
   // by an optional WebInputEvent which is provided only if the event was not
   // processed.
   IPC_MESSAGE_ROUTED0(ViewHostMsg_HandleInputEvent_ACK)
 
   IPC_MESSAGE_ROUTED0(ViewHostMsg_Focus)
   IPC_MESSAGE_ROUTED0(ViewHostMsg_Blur)
 
@@ skipping 1749 matching lines @@
                               base::PlatformFileInfo, /* info */
                               base::PlatformFileError /* error_code */)
 
   // Get the directory's contents.
   IPC_SYNC_MESSAGE_CONTROL1_2(ViewHostMsg_PepperGetDirContents,
                               FilePath /* path */,
                               PepperDirContents, /* contents */
                               base::PlatformFileError /* error_code */)
 
 IPC_END_MESSAGES(ViewHost)