signin: pull basic SigninManager functionality into new SigninManagerBase class.

chrome/test/base/chrome_render_view_host_test_harness.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/test/base/chrome_render_view_host_test_harness.h"
 
 #include "chrome/browser/signin/fake_signin_manager.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/test/base/testing_profile.h"
 
@@ skipping 18 matching lines @@
 
 TestingProfile* ChromeRenderViewHostTestHarness::profile() {
   return static_cast<TestingProfile*>(browser_context_.get());
 }
 
 RenderViewHostTester* ChromeRenderViewHostTestHarness::rvh_tester() {
   return RenderViewHostTester::For(rvh());
 }
 
 static ProfileKeyedService* BuildSigninManagerFake(Profile* profile) {
+#if defined (OS_CHROMEOS)
+  return new FakeSigninManagerBase(profile);
+#else
   return new FakeSigninManager(profile);
+#endif
 }
 
 void ChromeRenderViewHostTestHarness::SetUp() {
   Profile* profile = Profile::FromBrowserContext(browser_context_.get());
   if (!profile) {
     profile = new TestingProfile();
     browser_context_.reset(profile);
   }
   SigninManagerFactory::GetInstance()->SetTestingFactory(
           profile, BuildSigninManagerFake);
   RenderViewHostTestHarness::SetUp();
 }
 
 void ChromeRenderViewHostTestHarness::TearDown() {
   RenderViewHostTestHarness::TearDown();
 #if defined(USE_ASH)
   ash::Shell::DeleteInstance();
 #endif
 #if defined(USE_AURA)
   aura::Env::DeleteInstance();
 #endif
 }