[GCM] Exposing persistence of account mappings in GCM Driver

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 12 matching lines @@
 }
 
 namespace net {
 class IPEndPoint;
 class URLRequestContextGetter;
 }
 
 namespace gcm {
 
 class Encryptor;
+struct AccountMapping;
 
 // Interface that encapsulates the network communications with the Google Cloud
 // Messaging server. This interface is not supposed to be thread-safe.
 class GCMClient {
  public:
   enum Result {
     // Successful operation.
     SUCCESS,
     // Invalid parameter.
     INVALID_PARAMETER,
@@ skipping 226 matching lines @@
   // Clear all recorded GCM activity logs.
   virtual void ClearActivityLogs() = 0;
 
   // Gets internal states and statistics.
   virtual GCMStatistics GetStatistics() const = 0;
 
   // Sets a list of accounts with OAuth2 tokens for the next checkin.
   // |account_tokens| maps email addresses to OAuth2 access tokens.
   virtual void SetAccountsForCheckin(
       const std::map<std::string, std::string>& 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;
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_