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

chrome/browser/renderer_host/backing_store_proxy.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/backing_store_proxy.h"
 
 #include "build/build_config.h"
 #include "chrome/browser/gpu_process_host_ui_shim.h"
 #include "chrome/browser/renderer_host/render_process_host.h"
 #include "chrome/browser/renderer_host/render_widget_host.h"
 #include "chrome/common/gpu_messages.h"
 #include "chrome/common/render_messages.h"
 #include "gfx/rect.h"
 
-#if defined(OS_WIN)
-#include <windows.h>
-#endif
-
 BackingStoreProxy::BackingStoreProxy(RenderWidgetHost* widget,
                                      const gfx::Size& size,
                                      GpuProcessHostUIShim* process_shim,
                                      int32 routing_id)
     : BackingStore(widget, size),
       process_shim_(process_shim),
       routing_id_(routing_id),
       waiting_for_paint_ack_(false) {
   process_shim_->AddRoute(routing_id_, this);
 }
 
 BackingStoreProxy::~BackingStoreProxy() {
   process_shim_->RemoveRoute(routing_id_);
 }
 
 void BackingStoreProxy::PaintToBackingStore(
     RenderProcessHost* process,
-    TransportDIB::Id bitmap,
+    TransportDIB::Id dib_id,
+    TransportDIB::Handle dib_handle,
     const gfx::Rect& bitmap_rect,
     const std::vector<gfx::Rect>& copy_rects,
     bool* painted_synchronously) {
   DCHECK(!waiting_for_paint_ack_);
-
-  base::ProcessId process_id;
-#if defined(OS_WIN)
-  process_id = ::GetProcessId(process->GetHandle());
-#elif defined(OS_POSIX)
-  process_id = process->GetHandle();
-#endif
+  TransportDIB::ScopedHandle scoped_dib_handle(dib_handle);
 
   if (process_shim_->Send(new GpuMsg_PaintToBackingStore(
-          routing_id_, process_id, bitmap, bitmap_rect, copy_rects))) {
+          routing_id_, scoped_dib_handle.release(), bitmap_rect, copy_rects))) {
     // Message sent successfully, so the caller can not destroy the
     // TransportDIB. OnDonePaintingToBackingStore will free it later.
     *painted_synchronously = false;
     waiting_for_paint_ack_ = true;
   } else {
     // On error, we're done with the TransportDIB and the caller can free it.
     *painted_synchronously = true;
   }
 }
 
@@ skipping 31 matching lines @@
 
   // TODO(brettw): does this mean we aren't getting any more messages and we
   // should delete outselves?
 }
 
 void BackingStoreProxy::OnPaintToBackingStoreACK() {
   DCHECK(waiting_for_paint_ack_);
   render_widget_host()->DonePaintingToBackingStore();
   waiting_for_paint_ack_ = false;
 }