Make the chrome.webstore bindings load lazily.

chrome/renderer/extensions/extension_dispatcher.h

Index: chrome/renderer/extensions/extension_dispatcher.h
diff --git a/chrome/renderer/extensions/extension_dispatcher.h b/chrome/renderer/extensions/extension_dispatcher.h
index d16b8b95eab81a7cca2dc7530e2ef04c165e98f9..19bd42f229c347ce333d330a222b2a6ac4aa6a6e 100644
--- a/chrome/renderer/extensions/extension_dispatcher.h
+++ b/chrome/renderer/extensions/extension_dispatcher.h
@@ -104,6 +104,9 @@ class ExtensionDispatcher : public content::RenderProcessObserver {
 
  private:
   friend class RenderViewTest;
+  typedef void (*BindingInstaller)(ModuleSystem* module_system,
+                                  v8::Handle<v8::Object> chrome,
+                                  v8::Handle<v8::Object> chrome_hidden);
 
   // RenderProcessObserver implementation:
   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;