Componentize GCM Part 1: create GCM component and move some files over

chrome/browser/services/gcm/gcm_client_factory.h

-// 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.
-
-#ifndef CHROME_BROWSER_SERVICES_GCM_GCM_CLIENT_FACTORY_H_
-#define CHROME_BROWSER_SERVICES_GCM_GCM_CLIENT_FACTORY_H_
-
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-
-namespace gcm {
-
-class GCMClient;
-
-class GCMClientFactory {
- public:
-  GCMClientFactory();
-  virtual ~GCMClientFactory();
-
-  // Creates a new instance of GCMClient. The testing code could override this
-  // to provide a mocked instance.
-  virtual scoped_ptr<GCMClient> BuildInstance();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(GCMClientFactory);
-};
-
-}  // namespace gcm
-
-#endif  // CHROME_BROWSER_SERVICES_GCM_GCM_CLIENT_FACTORY_H_