[GCM] Adding last token fetching time handling

components/gcm_driver/gcm_client.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_H_
 #define COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 185 matching lines @@
     // |app_id|: application ID.
     // |message_id|: ID of the acknowledged message.
     virtual void OnSendAcknowledged(const std::string& app_id,
                                     const std::string& message_id) = 0;
 
     // Called when the GCM becomes ready. To get to this state, GCMClient
     // finished loading from the GCM store and retrieved the device check-in
     // from the server if it hadn't yet.
     // |account_mappings|: a persisted list of accounts mapped to this GCM
     //                     client.
-    virtual void OnGCMReady(
-        const std::vector<AccountMapping>& account_mappings) = 0;
+    // |last_token_fetch_time|: time of a last successful token fetch.
+    virtual void OnGCMReady(const std::vector<AccountMapping>& account_mappings,
+                            const base::Time& last_token_fetch_time) = 0;
 
     // Called when activities are being recorded and a new activity has just
     // been recorded.
     virtual void OnActivityRecorded() = 0;
 
     // Called when a new connection is established and a successful handshake
     // has been performed.
     virtual void OnConnected(const net::IPEndPoint& ip_endpoint) = 0;
 
     // Called when the connection is interrupted.
@@ skipping 70 matching lines @@
   //                   tokens.
   virtual void SetAccountTokens(
       const std::vector<AccountTokenInfo>& account_tokens) = 0;
 
   // Persists the |account_mapping| in the store.
   virtual void UpdateAccountMapping(const AccountMapping& account_mapping) = 0;
 
   // Removes the account mapping related to |account_id| from the persistent
   // store.
   virtual void RemoveAccountMapping(const std::string& account_id) = 0;
+
+  // Sets last token fetch time in persistent store.
+  virtual void SetLastTokenFetchTime(const base::Time& time) = 0;
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_