Bind plugin placeholder directly to v8 instead of over CppBoundClass

chrome/renderer/plugins/chrome_plugin_placeholder.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 CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_
 #define CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_
 
 #include "components/plugins/renderer/plugin_placeholder.h"
 
 struct ChromeViewHostMsg_GetPluginInfo_Status;
@@ skipping 31 matching lines @@
 #endif
 
  private:
   ChromePluginPlaceholder(content::RenderView* render_view,
                           blink::WebFrame* frame,
                           const blink::WebPluginParams& params,
                           const std::string& html_data,
                           const string16& title);
   virtual ~ChromePluginPlaceholder();
 
-  // WebViewPlugin::Delegate (via PluginPlaceholder) method
-  virtual void BindWebFrame(blink::WebFrame* frame) OVERRIDE;
+  // PluginPlaceholder method
+  virtual void Observe(const std::string& callback) OVERRIDE;
 
   // content::RenderViewObserver (via PluginPlaceholder) override:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // WebViewPlugin::Delegate (via PluginPlaceholder) methods:
   virtual void ShowContextMenu(const blink::WebMouseEvent&) OVERRIDE;
 
   // content::RenderProcessObserver methods:
   virtual void PluginListChanged() OVERRIDE;
 
   // content::ContextMenuClient methods:
   virtual void OnMenuAction(int request_id, unsigned action) OVERRIDE;
   virtual void OnMenuClosed(int request_id) OVERRIDE;
 
-  // Javascript callback opens chrome://plugins in a new tab.
-  // Arguments are required by the caller, but not used.
-  void OpenAboutPluginsCallback(const webkit_glue::CppArgumentList& args,
-                                webkit_glue::CppVariant* result);
-
   void OnLoadBlockedPlugins(const std::string& identifier);
   void OnSetIsPrerendering(bool is_prerendering);
 #if defined(ENABLE_PLUGIN_INSTALLATION)
   void OnDidNotFindMissingPlugin();
   void OnFoundMissingPlugin(const string16& plugin_name);
   void OnStartedDownloadingPlugin();
   void OnFinishedDownloadingPlugin();
   void OnErrorDownloadingPlugin(const std::string& error);
   void OnCancelledDownloadingPlugin();
 #endif
@@ skipping 11 matching lines @@
 #endif
 
   bool has_host_;
   int context_menu_request_id_;  // Nonzero when request pending.
   string16 plugin_name_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromePluginPlaceholder);
 };
 
 #endif  // CHROME_RENDERER_PLUGINS_CHROME_PLUGIN_PLACEHOLDER_H_