Cleanup: Remove unneeded includes of pref_names.h

chrome/browser/profiles/profile_manager_unittest.cc

 // 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.
 
 #include <string>
 
 #include "app/system_monitor.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "chrome/browser/browser_thread.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/notification_service.h"
-#include "chrome/common/pref_names.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class ProfileManagerTest : public testing::Test {
  protected:
   ProfileManagerTest() : ui_thread_(BrowserThread::UI, &message_loop_) {
   }
 
   virtual void SetUp() {
     // Name a subdirectory of the temp directory.
     ASSERT_TRUE(PathService::Get(base::DIR_TEMP, &test_dir_));
@@ skipping 109 matching lines @@
   // Force lazy-init of some profile services to simulate use.
   EXPECT_TRUE(profile1->GetHistoryService(Profile::EXPLICIT_ACCESS));
   EXPECT_TRUE(profile1->GetBookmarkModel());
   EXPECT_TRUE(profile2->GetBookmarkModel());
   EXPECT_TRUE(profile2->GetHistoryService(Profile::EXPLICIT_ACCESS));
   profile1.reset();
   profile2.reset();
   // Make sure history cleans up correctly.
   message_loop_.RunAllPending();
 }