Bind plugin placeholder directly to v8 instead of over CppBoundClass

components/plugins/renderer/plugin_placeholder.h

Index: components/plugins/renderer/plugin_placeholder.h
diff --git a/components/plugins/renderer/plugin_placeholder.h b/components/plugins/renderer/plugin_placeholder.h
index 2fa6116a921c49a45eee816a4a1163780a01859e..eec349ea53a6e21b73fa37018a42b5503e089687 100644
--- a/components/plugins/renderer/plugin_placeholder.h
+++ b/components/plugins/renderer/plugin_placeholder.h
@@ -11,7 +11,7 @@
 #include "content/public/renderer/render_process_observer.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "third_party/WebKit/public/web/WebPluginParams.h"
-#include "webkit/renderer/cpp_bound_class.h"
+#include "v8/include/v8.h"
 
 namespace content {
 struct WebPluginInfo;
@@ -21,7 +21,6 @@ namespace plugins {
 // Placeholders can be used if a plug-in is missing or not available
 // (blocked or disabled).
 class PluginPlaceholder : public content::RenderViewObserver,
-                          public webkit_glue::CppBoundClass,
                           public WebViewPlugin::Delegate {
  public:
 
@@ -44,6 +43,10 @@ class PluginPlaceholder : public content::RenderViewObserver,
 
   virtual ~PluginPlaceholder();
 
+  // Derived classes can override this method to install additional V8
+  // properties on the prototype of the window.plugin object.
+  virtual void InstallAdditionalCallbacks(v8::Handle<v8::Template> prototype);
+
   void OnLoadBlockedPlugins(const std::string& identifier);
   void OnSetIsPrerendering(bool is_prerendering);
 
@@ -74,19 +77,15 @@ class PluginPlaceholder : public content::RenderViewObserver,
   virtual void ShowContextMenu(const blink::WebMouseEvent&) OVERRIDE;
 
   // Javascript callbacks:
-  // All ignore arguments (which are, however, required by caller) and return
-  // nothing.
 
   // Load the blocked plugin by calling LoadPlugin().
-  void LoadCallback(const webkit_glue::CppArgumentList& args,
-                    webkit_glue::CppVariant* result);
+  static void LoadCallback(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   // Hide the blocked plugin by calling HidePlugin().
-  void HideCallback(const webkit_glue::CppArgumentList& args,
-                    webkit_glue::CppVariant* result);
+  static void HideCallback(const v8::FunctionCallbackInfo<v8::Value>& args);
 
-  void DidFinishLoadingCallback(const webkit_glue::CppArgumentList& args,
-                                webkit_glue::CppVariant* result);
+  static void DidFinishLoadingCallback(
+      const v8::FunctionCallbackInfo<v8::Value>& args);
 
   void UpdateMessage();