Make sure GetAuthenticatedAccountId() returns a canonicalized id.

chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos_unittest.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 530 matching lines @@
   EXPECT_FALSE(test_url_fetcher_factory_.GetFetcherByID(0));
 
   // Set a fake refresh token at the OAuth2TokenService.
   FakeProfileOAuth2TokenService* token_service =
     static_cast<FakeProfileOAuth2TokenService*>(
         ProfileOAuth2TokenServiceFactory::GetForProfile(profile_));
   ASSERT_TRUE(token_service);
   SigninManagerBase* signin_manager =
       SigninManagerFactory::GetForProfile(profile_);
   ASSERT_TRUE(signin_manager);
-  const std::string& account_id = signin_manager->GetAuthenticatedAccountId();
+  std::string account_id = signin_manager->GetAuthenticatedAccountId();
   EXPECT_FALSE(token_service->RefreshTokenIsAvailable(account_id));
   token_service->UpdateCredentials(account_id, "refresh_token");
   EXPECT_TRUE(token_service->RefreshTokenIsAvailable(account_id));
 
   // That should have notified the manager, which now issues the request for the
   // policy oauth token.
   MockDeviceManagementJob* register_request = IssueOAuthToken(true);
   ASSERT_TRUE(register_request);
   register_request->SendResponse(DM_STATUS_SUCCESS, register_blob_);
 
@@ skipping 20 matching lines @@
   EXPECT_TRUE(manager_->IsInitializationComplete(POLICY_DOMAIN_CHROME));
   EXPECT_TRUE(manager_->core()->client()->is_registered());
 
   // The refresh scheduler takes care of the initial fetch for unmanaged users.
   // Running the task runner issues the initial fetch.
   FetchPolicy(
       base::Bind(&base::TestSimpleTaskRunner::RunUntilIdle, task_runner_));
 }
 
 }  // namespace policy