On Windows, create a new TransportDIB::Handle struct which includes the file

chrome/common/gpu_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. It is included by backing_store_messages_internal.h
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 // This file needs to be included again, even though we're actually included
 // from it via utility_messages.h.
@@ skipping 56 matching lines @@
                       gfx::Size /* size */)
 
   // Creates a new video layer.
   IPC_MESSAGE_ROUTED2(GpuMsg_NewVideoLayer,
                       int32, /* video_layer_routing_id */
                       gfx::Size /* size */)
 
   // Updates the backing store with the given bitmap. The GPU process will send
   // back a GpuHostMsg_PaintToBackingStore_ACK after the paint is complete to
   // let the caller know the TransportDIB can be freed or reused.
-  IPC_MESSAGE_ROUTED4(GpuMsg_PaintToBackingStore,
-                      base::ProcessId, /* process */
-                      TransportDIB::Id, /* bitmap */
+  IPC_MESSAGE_ROUTED3(GpuMsg_PaintToBackingStore,
+                      TransportDIB::Handle, /* bitmap_handle */
                       gfx::Rect, /* bitmap_rect */
                       std::vector<gfx::Rect>) /* copy_rects */
 
-
   IPC_MESSAGE_ROUTED4(GpuMsg_ScrollBackingStore,
                       int, /* dx */
                       int, /* dy */
                       gfx::Rect, /* clip_rect */
                       gfx::Size) /* view_size */
 
   // Tells the GPU process that the RenderWidgetHost has painted the window.
   // Depending on the platform, the accelerated content may need to be painted
   // over the top.
   IPC_MESSAGE_ROUTED0(GpuMsg_WindowPainted)
 
   // Updates the video layer with the given YUV data. The GPU process will send
   // back a GpuHostMsg_PaintToVideoLayer_ACK after the paint is complete to
   // let the caller know the TransportDIB can be freed or reused.
-  IPC_MESSAGE_ROUTED3(GpuMsg_PaintToVideoLayer,
-                      base::ProcessId, /* process */
-                      TransportDIB::Id, /* bitmap */
+  IPC_MESSAGE_ROUTED2(GpuMsg_PaintToVideoLayer,
+                      TransportDIB::Handle, /* bitmap_handle */
                       gfx::Rect) /* bitmap_rect */
 
 IPC_END_MESSAGES(Gpu)
 
 //------------------------------------------------------------------------------
 // GPU Host Messages
 // These are messages from the GPU process to the browser.
 IPC_BEGIN_MESSAGES(GpuHost)
 
   // Sent in response to GpuMsg_PaintToBackingStore, see that for more.
@@ skipping 256 matching lines @@
 
   // GpuVideoDecoder report output format change.
   IPC_MESSAGE_ROUTED1(GpuVideoDecoderHostMsg_MediaFormatChange,
                       GpuVideoDecoderFormatChangeParam)
 
   // GpuVideoDecoder report error.
   IPC_MESSAGE_ROUTED1(GpuVideoDecoderHostMsg_ErrorNotification,
                       GpuVideoDecoderErrorInfoParam)
 
 IPC_END_MESSAGES(GpuVideoDecoderHost)