Move remaining non-test, non-Chrome-specific Prefs code to base/prefs/.

chrome/browser/ui/cocoa/extensions/extension_action_context_menu_browsertest.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/extensions/extension_action_context_menu.h"
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/path_service.h"
+#include "base/prefs/pref_service.h"
 #include "chrome/browser/extensions/browser_action_test_util.h"
 #include "chrome/browser/extensions/extension_action.h"
 #include "chrome/browser/extensions/extension_action_manager.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
-#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/cocoa/browser_window_cocoa.h"
 #include "chrome/browser/ui/cocoa/browser_window_controller.h"
 #import "chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.h"
 #include "chrome/browser/ui/cocoa/toolbar/toolbar_controller.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/pref_names.h"
@@ skipping 120 matching lines @@
                  to:[inspectItem target]
                from:inspectItem];
   devtools_attached_observer.Wait();
 
   // Hide the popup to prevent racy crashes at test cleanup.
   BrowserActionTestUtil test_util(browser());
   test_util.HidePopup();
 
   service->SetBoolean(prefs::kExtensionsUIDeveloperMode, original);
 }