Aura: Have ui::Layer implement WebKit::WebExternalTextureLayerClient

ui/aura/bench/bench_main.cc

 // Copyright (c) 2012 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 "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/i18n/icu_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
@@ skipping 126 matching lines @@
     context_->bindTexture(GL_TEXTURE_2D, texture_id());
     context_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     context_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     context_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     context_->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     context_->texImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
                          size.width(), size.height(), 0,
                          GL_RGBA, GL_UNSIGNED_BYTE, NULL);
   }
 
+  virtual WebGraphicsContext3D* hostContext3D() OVERRIDE {
+    return context_;
+  }
+
  private:
   virtual ~WebGLTexture() {
     context_->deleteTexture(texture_id());
   }
 
   WebGraphicsContext3D* context_;
 
   DISALLOW_COPY_AND_ASSIGN(WebGLTexture);
 };
 
@@ skipping 174 matching lines @@
 #endif
 
   root_window->ShowRootWindow();
   MessageLoopForUI::current()->Run();
   root_window.reset();
 
   ui::CompositorTestSupport::Terminate();
 
   return 0;
 }