Revert of [GCM] Fetching OAuth2 tokens periodically in account tracker

components/gcm_driver/gcm_client_impl.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_GCM_DRIVER_GCM_CLIENT_IMPL_H_
 #define COMPONENTS_GCM_DRIVER_GCM_CLIENT_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 212 matching lines @@
   // Callback for persisting device credentials in the |gcm_store_|.
   void SetDeviceCredentialsCallback(bool success);
 
   // Callback for persisting registration info in the |gcm_store_|.
   void UpdateRegistrationCallback(bool success);
 
   // Callback for all store operations that do not try to recover, if write in
   // |gcm_store_| fails.
   void DefaultStoreCallback(bool success);
 
-  // Callback for store operation where result does not matter.
-  void IgnoreWriteResultCallback(bool success);
-
   // Completes the registration request.
   void OnRegisterCompleted(const std::string& app_id,
                            const std::vector<std::string>& sender_ids,
                            RegistrationRequest::Status status,
                            const std::string& registration_id);
 
   // Completes the unregistration request.
   void OnUnregisterCompleted(const std::string& app_id,
                              UnregistrationRequest::Status status);
 
@@ skipping 77 matching lines @@
 
   // Factory for creating references in callbacks.
   base::WeakPtrFactory<GCMClientImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMClientImpl);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_CLIENT_IMPL_H_