Make WebUI webview content script work with incognito.

extensions/browser/web_ui_user_script_loader.h

 // Copyright 2015 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 EXTENSIONS_BROWSER_WEB_UI_USER_SCRIPT_LOADER_H_
 #define EXTENSIONS_BROWSER_WEB_UI_USER_SCRIPT_LOADER_H_
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 28 matching lines @@
   // Called at the end of each fetch, tracking whether all fetches are done.
   void OnSingleWebUIURLFetchComplete(extensions::UserScript::File* script_file,
                                      bool success,
                                      const std::string& data);
 
   // Called when the loads of the user scripts are done.
   void OnWebUIURLFetchComplete();
 
   // Creates WebUiURLFetchers for the given |script_files|.
   void CreateWebUIURLFetchers(extensions::UserScript::FileList* script_files,
+                              content::BrowserContext* browser_context,
                               int render_process_id,
                               int render_view_id);
 
   // Caches the render info of script from WebUI when AddScripts is called.
   // When starting to load the script, we look up this map to retrieve the
   // render info. It is used for the script from WebUI only, since the fetch
   // of script content requires the info of associated render.
   UserScriptRenderInfoMap script_render_info_map_;
 
   // The number of complete fetchs.
   size_t complete_fetchers_;
 
   // Caches |user_scripts_| from UserScriptLoader when loading.
   scoped_ptr<extensions::UserScriptList> user_scripts_cache_;
 
   LoadScriptsCallback scripts_loaded_callback_;
 
   ScopedVector<WebUIURLFetcher> fetchers_;
 
   DISALLOW_COPY_AND_ASSIGN(WebUIUserScriptLoader);
 };
 
 #endif  // EXTENSIONS_BROWSER_WEB_UI_USER_SCRIPT_LOADER_H_