Allow WebExternalTextureLayerClient to work with mailboxes.

content/renderer/browser_plugin/browser_plugin_compositing_helper.cc

 // Copyright (c) 2013 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/renderer/browser_plugin/browser_plugin_compositing_helper.h"
 
 #include "cc/layers/delegated_renderer_layer.h"
 #include "cc/layers/solid_color_layer.h"
 #include "cc/layers/texture_layer.h"
 #include "cc/output/context_provider.h"
@@ skipping 195 matching lines @@
   last_host_id_ = gpu_host_id;
 
   ack_pending_ = true;
   // Browser plugin getting destroyed, do a fast ACK.
   if (!background_layer_) {
     MailboxReleased(mailbox_name, gpu_route_id, gpu_host_id, 0);
     return;
   }
 
   if (!texture_layer_) {
-    texture_layer_ = cc::TextureLayer::CreateForMailbox();
+    texture_layer_ = cc::TextureLayer::CreateForMailbox(NULL);
     texture_layer_->SetIsDrawable(true);
     texture_layer_->SetContentsOpaque(true);
 
     background_layer_->AddChild(texture_layer_);
   }
 
   // The size of browser plugin container is not always equal to the size
   // of the buffer that arrives here. This could be for a number of reasons,
   // including autosize and a resize in progress.
   // During resize, the container size changes first and then some time
@@ skipping 57 matching lines @@
 }
 
 void BrowserPluginCompositingHelper::UpdateVisibility(bool visible) {
   if (texture_layer_)
     texture_layer_->SetIsDrawable(visible);
   if (delegated_layer_)
     delegated_layer_->SetIsDrawable(visible);
 }
 
 }  // namespace content