Move mock notification observer header from content\test to content\public\test. This way we can en…

content/test/notification_observer_mock.h

-// Copyright (c) 2011 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.
-
-#ifndef CONTENT_TEST_NOTIFICATION_OBSERVER_MOCK_H_
-#define CONTENT_TEST_NOTIFICATION_OBSERVER_MOCK_H_
-#pragma once
-
-#include "content/public/browser/notification_observer.h"
-#include "testing/gmock/include/gmock/gmock.h"
-
-namespace content {
-
-class NotificationDetails;
-class NotificationSource;
-
-class NotificationObserverMock : public NotificationObserver {
- public:
-  NotificationObserverMock();
-  virtual ~NotificationObserverMock();
-
-  MOCK_METHOD3(Observe, void(int type,
-                             const NotificationSource& source,
-                             const NotificationDetails& details));
-};
-
-}  // namespace content
-
-#endif  // CONTENT_TEST_NOTIFICATION_OBSERVER_MOCK_H_