Make TabContents ctor private; poke hole for existing callers.

chrome/browser/extensions/extension_tab_util.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/extensions/extension_tab_util.h"
 
 #include "chrome/browser/extensions/api/tabs/tabs_constants.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/extensions/window_controller.h"
 #include "chrome/browser/net/url_fixer_upper.h"
@@ skipping 214 matching lines @@
                                  const std::string& extension_id,
                                  WindowOpenDisposition disposition,
                                  const gfx::Rect& initial_pos,
                                  bool user_gesture) {
   Profile* profile =
       Profile::FromBrowserContext(web_contents->GetBrowserContext());
   Browser* browser = browser::FindTabbedBrowser(profile, false);
   const bool browser_created = !browser;
   if (!browser)
     browser = new Browser(Browser::CreateParams(profile));
-  TabContents* tab_contents = new TabContents(web_contents);
+  TabContents* tab_contents =
+      TabContents::Factory::CreateTabContents(web_contents);
   chrome::NavigateParams params(browser, tab_contents);
 
   // The extension_app_id parameter ends up as app_name in the Browser
   // which causes the Browser to return true for is_app().  This affects
   // among other things, whether the location bar gets displayed.
   // TODO(mpcomplete): This seems wrong. What if the extension content is hosted
   // in a tab?
   if (disposition == NEW_POPUP)
     params.extension_app_id = extension_id;
 
@@ skipping 17 matching lines @@
 
 // static
 extensions::WindowController* ExtensionTabUtil::GetWindowControllerOfTab(
     const WebContents* web_contents) {
   Browser* browser = browser::FindBrowserWithWebContents(web_contents);
   if (browser != NULL)
     return browser->extension_window_controller();
 
   return NULL;
 }