[GCM] Passing GCMClient::AccountTokenInfo list to GCMDriver

components/gcm_driver/gcm_account_mapper.cc

 // 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.
 
 #include "components/gcm_driver/gcm_account_mapper.h"
 
 #include "base/bind.h"
 #include "base/guid.h"
 #include "base/time/clock.h"
 #include "base/time/default_clock.h"
@@ skipping 38 matching lines @@
 void GCMAccountMapper::Initialize(
     const std::vector<AccountMapping>& account_mappings) {
   DCHECK(!initialized_);
   initialized_ = true;
   accounts_ = account_mappings;
   gcm_driver_->AddAppHandler(kGCMAccountMapperAppId, this);
   GetRegistration();
 }
 
 void GCMAccountMapper::SetAccountTokens(
-    const std::vector<GCMClient::AccountTokenInfo> account_tokens) {
+    const std::vector<GCMClient::AccountTokenInfo>& account_tokens) {
   // If account mapper is not ready to handle tasks yet, save the latest
   // account tokens and return.
   if (!IsReady()) {
     pending_account_tokens_ = account_tokens;
     // If mapper is initialized, but still does not have registration ID,
     // maybe the registration gave up. Retrying in case.
     if (initialized_)
       GetRegistration();
     return;
   }
@@ skipping 278 matching lines @@
   }
 
   return accounts_.end();
 }
 
 void GCMAccountMapper::SetClockForTesting(scoped_ptr<base::Clock> clock) {
   clock_ = clock.Pass();
 }
 
 }  // namespace gcm