[GCM] Passing GCMClient::AccountTokenInfo list to GCMDriver

components/gcm_driver/gcm_account_mapper.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_ACCOUNT_MAPPER_H_
 #define COMPONENTS_GCM_DRIVER_GCM_ACCOUNT_MAPPER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 19 matching lines @@
   typedef std::vector<AccountMapping> AccountMappings;
 
   explicit GCMAccountMapper(GCMDriver* gcm_driver);
   virtual ~GCMAccountMapper();
 
   void Initialize(const AccountMappings& account_mappings);
 
   // Called by AccountTracker, when a new list of account tokens is available.
   // This will cause a refresh of account mappings and sending updates to GCM.
   void SetAccountTokens(
-      const std::vector<GCMClient::AccountTokenInfo> account_tokens);
+      const std::vector<GCMClient::AccountTokenInfo>& account_tokens);
 
   // Implementation of GCMAppHandler:
   virtual void ShutdownHandler() OVERRIDE;
   virtual void OnMessage(const std::string& app_id,
                          const GCMClient::IncomingMessage& message) OVERRIDE;
   virtual void OnMessagesDeleted(const std::string& app_id) OVERRIDE;
   virtual void OnSendError(
       const std::string& app_id,
       const GCMClient::SendErrorDetails& send_error_details) OVERRIDE;
   virtual void OnSendAcknowledged(const std::string& app_id,
@@ skipping 64 matching lines @@
   bool initialized_;
 
   base::WeakPtrFactory<GCMAccountMapper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMAccountMapper);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_ACCOUNT_MAPPER_H_