Cleanup: Remove unneeded includes of pref_names.h

chrome/test/live_sync/live_preferences_sync_test.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_TEST_LIVE_SYNC_LIVE_PREFERENCES_SYNC_TEST_H_
 #define CHROME_TEST_LIVE_SYNC_LIVE_PREFERENCES_SYNC_TEST_H_
 #pragma once
 
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/common/pref_names.h"
 #include "chrome/test/live_sync/live_sync_test.h"
 
 class LivePreferencesSyncTest : public LiveSyncTest {
  public:
   explicit LivePreferencesSyncTest(TestType test_type)
       : LiveSyncTest(test_type) {}
   virtual ~LivePreferencesSyncTest() {}
 
   // Used to access the preferences within a particular sync profile.
   PrefService* GetPrefs(int index) {
@@ skipping 41 matching lines @@
 class ManyClientLivePreferencesSyncTest : public LivePreferencesSyncTest {
  public:
   ManyClientLivePreferencesSyncTest() : LivePreferencesSyncTest(MANY_CLIENT) {}
   virtual ~ManyClientLivePreferencesSyncTest() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ManyClientLivePreferencesSyncTest);
 };
 
 #endif  // CHROME_TEST_LIVE_SYNC_LIVE_PREFERENCES_SYNC_TEST_H_