We have a problem in the process on destroying WebContentsImpl because

chrome/browser/translate/translate_tab_helper.h

 // Copyright 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_TRANSLATE_TRANSLATE_TAB_HELPER_H_
 #define CHROME_BROWSER_TRANSLATE_TRANSLATE_TAB_HELPER_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 90 matching lines @@
   explicit TranslateTabHelper(content::WebContents* web_contents);
   friend class content::WebContentsUserData<TranslateTabHelper>;
 
   // content::WebContentsObserver implementation.
   virtual void NavigationEntryCommitted(
       const content::LoadCommittedDetails& load_details) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void DidNavigateAnyFrame(
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) OVERRIDE;
-  virtual void WebContentsDestroyed(
-      content::WebContents* web_contents) OVERRIDE;
+  virtual void WebContentsDestroyed() OVERRIDE;
 
   // Initiates translation once the page is finished loading.
   void InitiateTranslation(const std::string& page_lang, int attempt);
   void OnLanguageDetermined(const LanguageDetectionDetails& details,
                             bool page_needs_translation);
   void OnPageTranslated(int32 page_id,
                         const std::string& original_lang,
                         const std::string& translated_lang,
                         TranslateErrors::Type error_type);
 
@@ skipping 44 matching lines @@
 
   // Necessary for binding the callback to HandleCLDDataRequest on the blocking
   // pool and for delaying translation initialization until the page has
   // finished loading on a reload.
   base::WeakPtrFactory<TranslateTabHelper> weak_pointer_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TranslateTabHelper);
 };
 
 #endif  // CHROME_BROWSER_TRANSLATE_TRANSLATE_TAB_HELPER_H_