Create a WebFrameWidget for WebViewPlugin.

components/plugins/renderer/webview_plugin.h

 // Copyright 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 COMPONENTS_PLUGINS_RENDERER_WEBVIEW_PLUGIN_H_
 #define COMPONENTS_PLUGINS_RENDERER_WEBVIEW_PLUGIN_H_
 
 #include <list>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURLResponse.h"
 #include "third_party/WebKit/public/web/WebFrameClient.h"
 #include "third_party/WebKit/public/web/WebKit.h"
 #include "third_party/WebKit/public/web/WebPlugin.h"
 #include "third_party/WebKit/public/web/WebViewClient.h"
 
 namespace blink {
+class WebFrameWidget;
 class WebMouseEvent;
 }
 
 namespace content {
 class RenderView;
 struct WebPreferences;
 }
 
 namespace gfx {
 class Size;
@@ skipping 127 matching lines @@
 
   blink::WebCursorInfo current_cursor_;
 
   // Owns us.
   blink::WebPluginContainer* container_;
 
   // Owned by us, deleted via |close()|.
   blink::WebView* web_view_;
 
   // Owned by us, deleted via |close()|.
+  blink::WebFrameWidget* web_frame_widget_;
+
+  // Owned by us, deleted via |close()|.
   blink::WebFrame* web_frame_;
   gfx::Rect rect_;
 
   blink::WebURLResponse response_;
   std::list<std::string> data_;
   scoped_ptr<blink::WebURLError> error_;
   blink::WebString old_title_;
   bool finished_loading_;
   bool focused_;
 };
 
 #endif  // COMPONENTS_PLUGINS_RENDERER_WEBVIEW_PLUGIN_H_