Remove PrefService parameter from chrome::RegisterPrefs.

chrome/test/base/scoped_testing_local_state.cc

 // Copyright (c) 2013 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/scoped_testing_local_state.h"
 
 #include "chrome/browser/prefs/browser_prefs.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 ScopedTestingLocalState::ScopedTestingLocalState(
     TestingBrowserProcess* browser_process)
     : browser_process_(browser_process) {
-  chrome::RegisterLocalState(&local_state_, local_state_.registry());
+  chrome::RegisterLocalState(local_state_.registry());
   EXPECT_FALSE(browser_process->local_state());
   browser_process->SetLocalState(&local_state_);
 }
 
 ScopedTestingLocalState::~ScopedTestingLocalState() {
   EXPECT_EQ(&local_state_, browser_process_->local_state());
   browser_process_->SetLocalState(NULL);
 }