[Sync] Require ProfileSyncService to have an uninitialized backend on shutdown

chrome/browser/sync/profile_sync_service_startup_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 "testing/gtest/include/gtest/gtest.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/signin/signin_manager.h"
@@ skipping 53 matching lines @@
     file_thread_.Start();
     io_thread_.StartIOThread();
     profile_->CreateRequestContext();
     CreateSyncService();
     service_->AddObserver(&observer_);
     service_->set_synchronous_sync_configuration();
   }
 
   virtual void TearDown() {
     service_->RemoveObserver(&observer_);
+    service_->Shutdown();
     service_.reset();
     profile_.reset();
 
     // Pump messages posted by the sync core thread (which may end up
     // posting on the IO thread).
     ui_loop_.RunAllPending();
     io_thread_.Stop();
     file_thread_.Stop();
     ui_loop_.RunAllPending();
   }
@@ skipping 258 matching lines @@
 
   // Preload the tokens.
   TokenServiceFactory::GetForProfile(profile_.get())->IssueAuthTokenForTest(
       GaiaConstants::kSyncService, "sync_token");
   service_->fail_initial_download();
 
   service_->Initialize();
   EXPECT_FALSE(service_->sync_initialized());
   EXPECT_FALSE(service_->GetBackendForTest());
 }