Clean up PrefServiceBuilder

chrome/browser/profiles/profile_impl.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/profiles/profile_impl.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
@@ skipping 429 matching lines @@
       ManagedUserSettingsServiceFactory::GetForProfile(this);
   managed_user_settings->Init(
       path_, sequenced_task_runner, create_mode == CREATE_MODE_SYNCHRONOUS);
 #endif
 
   {
     // On startup, preference loading is always synchronous so a scoped timer
     // will work here.
     startup_metric_utils::ScopedSlowStartupUMA
         scoped_timer("Startup.SlowStartupPreferenceLoading");
-    prefs_.reset(chrome_prefs::CreateProfilePrefs(
+    prefs_ = chrome_prefs::CreateProfilePrefs(
         GetPrefFilePath(),
         sequenced_task_runner,
         profile_policy_connector_->policy_service(),
         managed_user_settings,
         new ExtensionPrefStore(
             ExtensionPrefValueMapFactory::GetForBrowserContext(this), false),
         pref_registry_,
-        async_prefs));
+        async_prefs).Pass();
     // Register on BrowserContext.
     user_prefs::UserPrefs::Set(this, prefs_.get());
   }
 
   startup_metric_utils::ScopedSlowStartupUMA
       scoped_timer("Startup.SlowStartupFinalProfileInit");
   if (async_prefs) {
     // Wait for the notification that prefs has been loaded
     // (successfully or not).  Note that we can use base::Unretained
     // because the PrefService is owned by this class and lives on
@@ skipping 772 matching lines @@
 PrefProxyConfigTracker* ProfileImpl::CreateProxyConfigTracker() {
 #if defined(OS_CHROMEOS)
   if (chromeos::ProfileHelper::IsSigninProfile(this)) {
     return ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
         g_browser_process->local_state());
   }
 #endif  // defined(OS_CHROMEOS)
   return ProxyServiceFactory::CreatePrefProxyConfigTrackerOfProfile(
       GetPrefs(), g_browser_process->local_state());
 }