Add infrastructure to instantiate a helper plugin.

content/renderer/render_view_impl.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 419 matching lines @@
       const WebKit::WebGraphicsContext3D::Attributes& attributes);
   virtual void didAddMessageToConsole(
       const WebKit::WebConsoleMessage& message,
       const WebKit::WebString& source_name,
       unsigned source_line);
   virtual void printPage(WebKit::WebFrame* frame);
   virtual WebKit::WebNotificationPresenter* notificationPresenter();
   virtual bool enumerateChosenDirectory(
       const WebKit::WebString& path,
       WebKit::WebFileChooserCompletion* chooser_completion);
+  virtual void initializeHelperPluginWebFrame(WebKit::WebHelperPlugin*);
   virtual void didStartLoading();
   virtual void didStopLoading();
   virtual void didChangeLoadProgress(WebKit::WebFrame* frame,
                                      double load_progress);
   virtual bool isSmartInsertDeleteEnabled();
   virtual bool isSelectTrailingWhitespaceEnabled();
   virtual void didChangeSelection(bool is_selection_empty);
   virtual void didExecuteCommand(const WebKit::WebString& command_name);
   virtual bool handleCurrentKeyboardEvent();
   virtual WebKit::WebColorChooser* createColorChooser(
@@ skipping 981 matching lines @@
   // bunch of stuff, you should probably create a helper class and put your
   // data and methods on that to avoid bloating RenderView more.  You can
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_