Cleanup: Remove unneeded includes of pref_names.h

chrome/browser/tabs/tab_strip_model_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 <map>
 #include <string>
 
 #include "app/system_monitor.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ skipping 14 matching lines @@
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/tabs/tab_strip_model_delegate.h"
 #include "chrome/browser/tabs/tab_strip_model_order_controller.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/notification_details.h"
 #include "chrome/common/notification_observer_mock.h"
 #include "chrome/common/notification_registrar.h"
 #include "chrome/common/notification_source.h"
-#include "chrome/common/pref_names.h"
 #include "chrome/common/property_bag.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/testing_profile.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::_;
 
 namespace {
 
 // Class used to delete a TabContents when another TabContents is destroyed.
@@ skipping 1844 matching lines @@
   TabStripModel strip(&delegate, profile());
   TabContentsWrapper* contents1 = CreateTabContents();
   TabContentsWrapper* contents2 = CreateTabContents();
   strip.AppendTabContents(contents1, true);
   strip.AppendTabContents(contents2, true);
   // DeleteTabContentsOnDestroyedObserver deletes contents1 when contents2 sends
   // out notification that it is being destroyed.
   DeleteTabContentsOnDestroyedObserver observer(contents2, contents1);
   strip.CloseAllTabs();
 }