Switch Blink to the new Web Notifications permission path.

Source/web/NotificationPermissionClientImpl.cpp

 // Copyright 2014 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 "config.h"
 #include "web/NotificationPermissionClientImpl.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
 #include "modules/notifications/Notification.h"
@@ skipping 12 matching lines @@
     WebNotificationPermissionCallbackImpl(ExecutionContext* executionContext, PassOwnPtr<NotificationPermissionCallback> callback)
         : m_executionContext(executionContext)
         , m_callback(callback)
     {
     }
 
     virtual ~WebNotificationPermissionCallbackImpl() { }
 
     virtual void permissionRequestComplete(WebNotificationPermission permission) OVERRIDE
     {
-        m_callback->handleEvent(Notification::permissionString(static_cast<NotificationClient::Permission>(permission)));
+        if (m_callback)
+            m_callback->handleEvent(Notification::permissionString(static_cast<NotificationClient::Permission>(permission)));
     }
 
     // FIXME: Deprecated. Notification::permission() requires another round-trip
     // to the browser process using a synchronous IPC.
     virtual void permissionRequestComplete() OVERRIDE
     {
-        m_callback->handleEvent(Notification::permission(m_executionContext));
+        if (m_callback)
+            m_callback->handleEvent(Notification::permission(m_executionContext));
     }
 
 private:
     ExecutionContext* m_executionContext;
     OwnPtr<NotificationPermissionCallback> m_callback;
 };
 
 } // namespace
 
 PassOwnPtrWillBeRawPtr<NotificationPermissionClientImpl> NotificationPermissionClientImpl::create()
 {
     return adoptPtrWillBeNoop(new NotificationPermissionClientImpl());
 }
 
 NotificationPermissionClientImpl::NotificationPermissionClientImpl()
 {
 }
 
 NotificationPermissionClientImpl::~NotificationPermissionClientImpl()
 {
 }
 
 void NotificationPermissionClientImpl::requestPermission(ExecutionContext* context, PassOwnPtr<NotificationPermissionCallback> callback)
 {
     ASSERT(context && context->isDocument());
-    ASSERT(callback);
 
     Document* document = toDocument(context);
     WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(document->frame());
 
     webFrame->client()->requestNotificationPermission(WebSecurityOrigin(context->securityOrigin()), new WebNotificationPermissionCallbackImpl(context, callback));
 }
 
 } // namespace blink