Cleanup: Remove unneeded chrome/common/pref_names.h includes.

chrome/browser/sessions/session_restore_browsertest_chromeos.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 <list>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_iterator.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
-#include "chrome/common/pref_names.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "components/sessions/serialized_navigation_entry_test_helper.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/test/test_utils.h"
 
 namespace {
 const char* test_app_popup_name1 = "TestApp1";
 const char* test_app_popup_name2 = "TestApp2";
 }
 
@@ skipping 133 matching lines @@
   size_t total_count = 0;
   size_t maximized_count = 0;
   for (chrome::BrowserIterator it; !it.done(); it.Next()) {
     ++total_count;
     if (it->window()->IsMaximized())
       ++maximized_count;
   }
   EXPECT_EQ(4u, total_count);
   EXPECT_EQ(2u, maximized_count);
 }