Bind plugin placeholder directly to v8 instead of over CppBoundClass

chrome/renderer/plugins/chrome_plugin_placeholder.h

Index: chrome/renderer/plugins/chrome_plugin_placeholder.h
diff --git a/chrome/renderer/plugins/chrome_plugin_placeholder.h b/chrome/renderer/plugins/chrome_plugin_placeholder.h
index 0e8b1e38768aba3f0cb0c84d8e796a3ff07eb967..64f64507f493742635e449fe8d5cb9a726b6c2da 100644
--- a/chrome/renderer/plugins/chrome_plugin_placeholder.h
+++ b/chrome/renderer/plugins/chrome_plugin_placeholder.h
@@ -49,9 +49,6 @@ class ChromePluginPlaceholder : public plugins::PluginPlaceholder,
                           const string16& title);
   virtual ~ChromePluginPlaceholder();
 
-  // WebViewPlugin::Delegate (via PluginPlaceholder) method
-  virtual void BindWebFrame(blink::WebFrame* frame) OVERRIDE;
-
   // content::RenderViewObserver (via PluginPlaceholder) override:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
@@ -66,9 +63,7 @@ class ChromePluginPlaceholder : public plugins::PluginPlaceholder,
   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 OpenAboutPluginsCallback();
 
   void OnLoadBlockedPlugins(const std::string& identifier);
   void OnSetIsPrerendering(bool is_prerendering);
@@ -97,6 +92,8 @@ class ChromePluginPlaceholder : public plugins::PluginPlaceholder,
   int context_menu_request_id_;  // Nonzero when request pending.
   string16 plugin_name_;
 
+  base::WeakPtrFactory<ChromePluginPlaceholder> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromePluginPlaceholder);
 };