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

chrome/browser/ui/cocoa/dev_tools_controller.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/dev_tools_controller.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include <Cocoa/Cocoa.h>
 
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #import "chrome/browser/ui/cocoa/view_id_util.h"
-#include "chrome/common/pref_names.h"
 #include "content/public/browser/web_contents.h"
 #include "ui/base/cocoa/base_view.h"
 #include "ui/base/cocoa/focus_tracker.h"
 #include "ui/gfx/mac/scoped_ns_disable_screen_updates.h"
 #include "ui/gfx/size_conversions.h"
 
 using content::WebContents;
 
 @interface DevToolsContainerView : BaseView {
   DevToolsContentsResizingStrategy strategy_;
@@ skipping 128 matching lines @@
     contents->SetAllowOtherViews(false);
   }
 
   BOOL result = [devToolsContainerView_ setDevToolsView:devToolsView
                                            withStrategy:strategy];
   [devToolsContainerView_ adjustSubviews];
   return result;
 }
 
 @end