[GCM] Adding last token fetching time handling

components/gcm_driver/gcm_driver.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_DRIVER_H_
 #define COMPONENTS_GCM_DRIVER_GCM_DRIVER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 115 matching lines @@
   virtual void SetAccountTokens(
       const std::vector<GCMClient::AccountTokenInfo>& account_tokens) = 0;
 
   // Updates the |account_mapping| information in persistent store.
   virtual void UpdateAccountMapping(const AccountMapping& account_mapping) = 0;
 
   // Removes the account mapping information reated to |account_id| from
   // persistent store.
   virtual void RemoveAccountMapping(const std::string& account_id) = 0;
 
+  // Getter and setter of last token fetch time.
+  virtual base::Time GetLastTokenFetchTime() = 0;
+  virtual void SetLastTokenFetchTime(const base::Time& time) = 0;
+
  protected:
   // Ensures that the GCM service starts (if necessary conditions are met).
   virtual GCMClient::Result EnsureStarted() = 0;
 
   // Platform-specific implementation of Register.
   virtual void RegisterImpl(const std::string& app_id,
                             const std::vector<std::string>& sender_ids) = 0;
 
   // Platform-specific implementation of Unregister.
   virtual void UnregisterImpl(const std::string& app_id) = 0;
@@ skipping 41 matching lines @@
 
   // The default handler when no app handler can be found in the map.
   DefaultGCMAppHandler default_app_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMDriver);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_DRIVER_H_