We have a problem in the process on destroying WebContentsImpl because

chrome/browser/ui/autofill/tab_autofill_manager_delegate.cc

 // 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.
 
 #include "chrome/browser/ui/autofill/tab_autofill_manager_delegate.h"
 
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/autofill/autofill_cc_infobar_delegate.h"
 #include "chrome/browser/autofill/personal_data_manager_factory.h"
@@ skipping 151 matching lines @@
 bool TabAutofillManagerDelegate::IsAutocompleteEnabled() {
   // For browser, Autocomplete is always enabled as part of Autofill.
   return GetPrefs()->GetBoolean(prefs::kAutofillEnabled);
 }
 
 void TabAutofillManagerDelegate::HideRequestAutocompleteDialog() {
   if (dialog_controller_.get())
     dialog_controller_->Hide();
 }
 
-void TabAutofillManagerDelegate::WebContentsDestroyed(
-    content::WebContents* web_contents) {
+void TabAutofillManagerDelegate::WebContentsDestroyed() {
   HideAutofillPopup();
 }
 
 void TabAutofillManagerDelegate::DetectAccountCreationForms(
     const std::vector<autofill::FormStructure*>& forms) {
   password_manager::PasswordGenerationManager* manager =
       ChromePasswordManagerClient::GetGenerationManagerFromWebContents(
           web_contents_);
   if (manager)
     manager->DetectAccountCreationForms(forms);
 }
 
 void TabAutofillManagerDelegate::DidFillOrPreviewField(
     const base::string16& autofilled_value,
     const base::string16& profile_full_name) {
 #if defined(OS_ANDROID)
   AutofillLoggerAndroid::DidFillOrPreviewField(
       autofilled_value, profile_full_name);
 #endif  // defined(OS_ANDROID)
 }
 
 }  // namespace autofill