Switch Extensions::TabHelper to use WebContents, WebContentsUserData.

chrome/browser/ui/views/location_bar/page_action_image_view.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/views/location_bar/page_action_image_view.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/api/commands/command_service.h"
 #include "chrome/browser/extensions/api/commands/command_service_factory.h"
 #include "chrome/browser/extensions/extension_context_menu_model.h"
@@ skipping 114 matching lines @@
     popup_->GetWidget()->RemoveObserver(this);
   HidePopup();
 }
 
 void PageActionImageView::ExecuteAction(
     ExtensionPopup::ShowAction show_action) {
   TabContents* tab_contents = owner_->GetTabContents();
   if (!tab_contents)
     return;
 
+  extensions::TabHelper* extensions_tab_helper =
+      extensions::TabHelper::FromWebContents(tab_contents->web_contents());
   LocationBarController* controller =
-      tab_contents->extension_tab_helper()->location_bar_controller();
+      extensions_tab_helper->location_bar_controller();
 
   switch (controller->OnClicked(page_action_->extension_id(), 1)) {
     case LocationBarController::ACTION_NONE:
       break;
 
     case LocationBarController::ACTION_SHOW_POPUP:
       ShowPopupWithURL(page_action_->GetPopupUrl(current_tab_id_), show_action);
       break;
 
     case LocationBarController::ACTION_SHOW_CONTEXT_MENU:
@@ skipping 169 matching lines @@
 
   popup_ = ExtensionPopup::ShowPopup(popup_url, browser_, this, arrow_location,
                                      show_action);
   popup_->GetWidget()->AddObserver(this);
 }
 
 void PageActionImageView::HidePopup() {
   if (popup_)
     popup_->GetWidget()->Close();
 }