signin: pull basic SigninManager functionality into new SigninManagerBase class.

chrome/browser/sync/profile_sync_service_preference_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 <map>
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
@@ skipping 131 matching lines @@
         syncer::BaseNode::INIT_OK)
       return 0;
     return node.GetTotalNodeCount() - 1;
   }
 
   bool StartSyncService(const base::Closure& callback,
                         bool will_fail_association) {
     if (sync_service_)
       return false;
 
-    SigninManager* signin = SigninManagerFactory::GetForProfile(profile_.get());
+    SigninManagerBase* signin =
+         SigninManagerFactory::GetForProfile(profile_.get());
     signin->SetAuthenticatedUsername("test");
     sync_service_ = static_cast<TestProfileSyncService*>(
         ProfileSyncServiceFactory::GetInstance()->SetTestingFactoryAndUse(
             profile_.get(), &TestProfileSyncService::BuildAutoStartAsyncInit));
     sync_service_->set_backend_init_callback(callback);
     pref_sync_service_ = reinterpret_cast<PrefModelAssociator*>(
         prefs_->GetSyncableService(syncer::PREFERENCES));
     if (!pref_sync_service_)
       return false;
     ProfileSyncComponentsFactoryMock* components =
@@ skipping 513 matching lines @@
   EXPECT_FALSE(pref->IsDefaultValue());
   // There should be no synced value.
   EXPECT_TRUE(GetSyncedValue(prefs::kHomePage) == NULL);
   // Switch kHomePage back to unmanaged.
   profile_->GetTestingPrefService()->RemoveManagedPref(prefs::kHomePage);
   // The original value should be picked up.
   EXPECT_TRUE(pref->IsDefaultValue());
   // There should still be no synced value.
   EXPECT_TRUE(GetSyncedValue(prefs::kHomePage) == NULL);
 }