Enable clear cache/cookies support in developer tools

content/browser/debugger/devtools_window.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 CONTENT_BROWSER_DEBUGGER_DEVTOOLS_WINDOW_H_
 #define CONTENT_BROWSER_DEBUGGER_DEVTOOLS_WINDOW_H_
 #pragma once
 
 #include <string>
 
@@ skipping 68 matching lines @@
   virtual void AddNewContents(TabContents* source,
                               TabContents* new_contents,
                               WindowOpenDisposition disposition,
                               const gfx::Rect& initial_pos,
                               bool user_gesture);
   virtual void CloseContents(TabContents* source) {}
   virtual bool CanReloadContents(TabContents* source) const;
   virtual bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
                                       bool* is_keyboard_shortcut);
   virtual void HandleKeyboardEvent(const NativeWebKeyboardEvent& event);
+  virtual content::JavaScriptDialogCreator* GetJavaScriptDialogCreator();
 
   virtual void FrameNavigating(const std::string& url) {}
 
   Profile* profile_;
   TabContentsWrapper* inspected_tab_;
   TabContentsWrapper* tab_contents_;
   Browser* browser_;
   bool docked_;
   bool is_loaded_;
   DevToolsToggleAction action_on_load_;
   NotificationRegistrar registrar_;
   DISALLOW_COPY_AND_ASSIGN(DevToolsWindow);
 };
 
 #endif  // CONTENT_BROWSER_DEBUGGER_DEVTOOLS_WINDOW_H_