Adds a TransportDIB::Id value that is explicitly invalid and use it when compositing

content/browser/renderer_host/accelerated_surface_container_mac.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 "content/browser/renderer_host/accelerated_surface_container_mac.h"
 
 #include "app/surface/io_surface_support_mac.h"
 #include "base/logging.h"
 #include "content/browser/renderer_host/accelerated_surface_container_manager_mac.h"
 #include "webkit/plugins/npapi/webplugin.h"
@@ skipping 24 matching lines @@
   // only contains garbage data. Update the surface in |set_was_painted_to()|
   // instead.
   width_ = width;
   height_ = height;
 }
 
 void AcceleratedSurfaceContainerMac::SetSizeAndTransportDIB(
     int32 width,
     int32 height,
     TransportDIB::Handle transport_dib) {
-  if (TransportDIB::is_valid(transport_dib)) {
+  if (TransportDIB::is_valid_handle(transport_dib)) {
     transport_dib_.reset(TransportDIB::Map(transport_dib));
     EnqueueTextureForDeletion();
     width_ = width;
     height_ = height;
   }
 }
 
 void AcceleratedSurfaceContainerMac::SetGeometry(
     const webkit::npapi::WebPluginGeometry& geom) {
   visible_ = geom.visible;
@@ skipping 168 matching lines @@
 }
 
 void AcceleratedSurfaceContainerMac::EnqueueTextureForDeletion() {
   if (texture_) {
     DCHECK(texture_pending_deletion_ == 0);
     texture_pending_deletion_ = texture_;
     texture_ = 0;
   }
 }