Remove unnecessary image downloading handler of notifications.

chrome/browser/extensions/api/notifications/notifications_api.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/extensions/api/notifications/notifications_api.h"
 
 #include "base/callback.h"
 #include "base/guid.h"
 #include "base/rand_util.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 104 matching lines @@
     args->Append(new base::FundamentalValue(index));
     SendEvent(notifications::OnButtonClicked::kEventName,
               EventRouter::USER_GESTURE_ENABLED,
               args.Pass());
   }
 
   virtual std::string id() const override {
     return scoped_id_;
   }
 
-  virtual content::WebContents* GetWebContents() const override {
-    // We're holding a reference to api_function_, so we know it'll be valid
-    // until ReleaseRVH is called, and api_function_ (as a
-    // AsyncExtensionFunction) will zero out its copy of render_view_host
-    // when the RVH goes away.
-    if (!api_function_.get())
-      return NULL;
-    content::RenderViewHost* rvh = api_function_->render_view_host();
-    if (!rvh)
-      return NULL;
-    return content::WebContents::FromRenderViewHost(rvh);
-  }
-
-  virtual void ReleaseRenderViewHost() override {
-    api_function_ = NULL;
-  }
-
  private:
   virtual ~NotificationsApiDelegate() {}
 
   void SendEvent(const std::string& name,
                  EventRouter::UserGestureState user_gesture,
                  scoped_ptr<base::ListValue> args) {
     scoped_ptr<Event> event(new Event(name, args.Pass()));
     event->user_gesture = user_gesture;
     EventRouter::Get(profile_)->DispatchEventToExtension(extension_id_,
                                                          event.Pass());
@@ skipping 472 matching lines @@
           ? api::notifications::PERMISSION_LEVEL_GRANTED
           : api::notifications::PERMISSION_LEVEL_DENIED;
 
   SetResult(new base::StringValue(api::notifications::ToString(result)));
   SendResponse(true);
 
   return true;
 }
 
 }  // namespace extensions