Enables compositing support for webview.

content/renderer/browser_plugin/browser_plugin_compositing_helper.h

+// 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.
+
+#ifndef  CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_COMPOSITING_HELPER_H_
+#define  CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_COMPOSITING_HELPER_H_
+
+#include <string>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "content/common/content_export.h"
+#include "ui/gfx/size.h"
+
+namespace cc {
+class TextureLayer;
+}
+
+namespace WebKit {
+class WebPluginContainer;
+class WebLayer;
+}
+
+namespace content {
+
+class CONTENT_EXPORT BrowserPluginCompositingHelper {
+ public:
+  BrowserPluginCompositingHelper(WebKit::WebPluginContainer* container,
+                                 int host_routing_id);
+  ~BrowserPluginCompositingHelper();
+
+  void EnableCompositing(bool);
+  void OnBuffersSwapped(const gfx::Size& size,
+                        const std::string& mailbox_name,
+                        int gpu_route_id,
+                        int gpu_host_id);
+
+ private:
+  int host_routing_id_;
+  bool last_mailbox_valid_;
+
+  scoped_refptr<cc::TextureLayer> texture_layer_;
+  scoped_ptr<WebKit::WebLayer> web_layer_;
+  WebKit::WebPluginContainer* container_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_COMPOSITING_HELPER_H_