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/context_provider.h"
 #include "cc/solid_color_layer.h"
 #include "cc/texture_layer.h"
 #include "content/common/browser_plugin/browser_plugin_messages.h"
@@ skipping 22 matching lines @@
       ack_pending_for_crashed_guest_(false),
       container_(container),
       browser_plugin_manager_(manager) {
 }
 
 BrowserPluginCompositingHelper::~BrowserPluginCompositingHelper() {
 }
 
 void BrowserPluginCompositingHelper::EnableCompositing(bool enable) {
   if (enable && !texture_layer_) {
-    texture_layer_ = cc::TextureLayer::CreateForMailbox();
+    texture_layer_ = cc::TextureLayer::Create(NULL, true);
     texture_layer_->SetIsDrawable(true);
     texture_layer_->SetContentsOpaque(true);
 
     background_layer_ = cc::SolidColorLayer::Create();
     background_layer_->SetMasksToBounds(true);
     background_layer_->SetBackgroundColor(
         SkColorSetARGBInline(255, 255, 255, 255));
     background_layer_->AddChild(texture_layer_);
     web_layer_.reset(new WebKit::WebLayerImpl(background_layer_));
   }
@@ skipping 169 matching lines @@
   texture_layer_->SetNeedsDisplay();
   last_mailbox_valid_ = current_mailbox_valid;
 }
 
 void BrowserPluginCompositingHelper::UpdateVisibility(bool visible) {
   if (texture_layer_)
     texture_layer_->SetIsDrawable(visible);
 }
 
 }  // namespace content