Introduce a layering in the invalidation component as public and impl

components/invalidation/impl/gcm_network_channel_delegate.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 COMPONENTS_INVALIDATION_GCM_NETWORK_CHANNEL_DELEGATE_H_
-#define COMPONENTS_INVALIDATION_GCM_NETWORK_CHANNEL_DELEGATE_H_
+#ifndef COMPONENTS_INVALIDATION_IMPL_GCM_NETWORK_CHANNEL_DELEGATE_H_
+#define COMPONENTS_INVALIDATION_IMPL_GCM_NETWORK_CHANNEL_DELEGATE_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "components/gcm_driver/gcm_client.h"
 
 class GoogleServiceAuthError;
 
 namespace syncer {
 
@@ skipping 25 matching lines @@
   virtual void InvalidateToken(const std::string& token) = 0;
 
   // Request registration_id from GCMService. Callback should be called with
   // either registration id or error code.
   virtual void Register(RegisterCallback callback) = 0;
   // Provide callback for incoming messages from GCM.
   virtual void SetMessageReceiver(MessageCallback callback) = 0;
 };
 }  // namespace syncer
 
-#endif  // COMPONENTS_INVALIDATION_GCM_NETWORK_CHANNEL_DELEGATE_H_
+#endif  // COMPONENTS_INVALIDATION_IMPL_GCM_NETWORK_CHANNEL_DELEGATE_H_