Set extension-related webkit preferences in a common location.

chrome/browser/tab_contents/render_view_host_delegate_helper.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_TAB_CONTENTS_RENDER_VIEW_HOST_DELEGATE_HELPER_H_
 #define CHROME_BROWSER_TAB_CONTENTS_RENDER_VIEW_HOST_DELEGATE_HELPER_H_
 #pragma once
 
 #include <map>
 
@@ skipping 107 matching lines @@
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostDelegateViewHelper);
 };
 
 
 // Provides helper methods that provide common implementations of some
 // RenderViewHostDelegate methods.
 class RenderViewHostDelegateHelper {
  public:
-  static WebPreferences GetWebkitPrefs(content::BrowserContext* browser_context,
-                                       bool is_web_ui);
+  static WebPreferences GetWebkitPrefs(RenderViewHost* rvh);
 
   static void UpdateInspectorSetting(content::BrowserContext* browser_context,
                                      const std::string& key,
                                      const std::string& value);
   static void ClearInspectorSettings(content::BrowserContext* browser_context);
 
  private:
   RenderViewHostDelegateHelper();
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostDelegateHelper);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_RENDER_VIEW_HOST_DELEGATE_HELPER_H_