Replace direct access to kGoogleServicesUsername with calls to SigninManager.

chrome/browser/sync/profile_sync_service_mock.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/sync/profile_sync_service_mock.h"
 
 #include "base/prefs/pref_service.h"
 #include "base/prefs/testing_pref_store.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
@@ skipping 28 matching lines @@
           ProfileOAuth2TokenServiceFactory::GetForProfile(profile),
           browser_sync::MANUAL_START) {
 }
 
 ProfileSyncServiceMock::~ProfileSyncServiceMock() {
 }
 
 // static
 TestingProfile* ProfileSyncServiceMock::MakeSignedInTestingProfile() {
   TestingProfile* profile = new TestingProfile();
-  profile->GetPrefs()->SetString(prefs::kGoogleServicesUsername, "foo");
+  SigninManagerFactory::GetForProfile(profile)->
+      SetAuthenticatedUsername("foo");
   return profile;
 }
 
 // static
 KeyedService* ProfileSyncServiceMock::BuildMockProfileSyncService(
     content::BrowserContext* profile) {
   return new ProfileSyncServiceMock(static_cast<Profile*>(profile));
 }