Refactor PluginPermissionHelper as WebViewPermissionHelper

chrome/browser/guest_view/guest_view_base.h

Index: chrome/browser/guest_view/guest_view_base.h
diff --git a/chrome/browser/guest_view/guest_view_base.h b/chrome/browser/guest_view/guest_view_base.h
index 95c19e1d32482b9a157988b76f8118be29cafbc2..c9b5d8e0ce8342ec0c52d9f867d2a2e1bea2ea0c 100644
--- a/chrome/browser/guest_view/guest_view_base.h
+++ b/chrome/browser/guest_view/guest_view_base.h
@@ -151,15 +151,17 @@ class GuestViewBase : public content::BrowserPluginGuestDelegate,
   virtual void RegisterDestructionCallback(
       const DestructionCallback& callback) OVERRIDE FINAL;
 
+  // Dispatches an event |event_name| to the embedder with the |event| fields.
+  // Change this function as a public function because WebViewGuest will use it
+  // to dispatch permission request event.
+  void DispatchEvent(Event* event);
+
  protected:
   GuestViewBase(int guest_instance_id,
                 content::WebContents* guest_web_contents,
                 const std::string& embedder_extension_id);
   virtual ~GuestViewBase();
 
-  // Dispatches an event |event_name| to the embedder with the |event| fields.
-  void DispatchEvent(Event* event);
-
  private:
   class EmbedderWebContentsObserver;