Make TabContents ctor private; poke hole for existing callers.

chrome/browser/extensions/api/identity/web_auth_flow.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/api/identity/web_auth_flow.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/message_loop.h"
@@ skipping 90 matching lines @@
       content::PAGE_TRANSITION_START_PAGE,
       std::string());
 }
 
 WebContents* WebAuthFlow::CreateWebContents() {
   return WebContents::Create(profile_, NULL, MSG_ROUTING_NONE, NULL);
 }
 
 void WebAuthFlow::ShowAuthFlowPopup() {
   // Pass ownership of WebContents to TabContents.
-  tab_contents_ = new TabContents(contents_);
+  tab_contents_ = TabContents::Factory::CreateTabContents(contents_);
   contents_ = NULL;
   Browser* browser = new Browser(Browser::CreateParams(
       Browser::TYPE_POPUP, profile_));
   chrome::NavigateParams params(browser, tab_contents_);
   params.disposition = CURRENT_TAB;
   params.window_action = chrome::NavigateParams::SHOW_WINDOW;
   chrome::Navigate(&params);
   // Observe method will be called before URLs are loaded. That is where
   // we check for redirect to the right URL.
 }
@@ skipping 88 matching lines @@
 
 void WebAuthFlow::InitValidRedirectUrlPrefixes(
     const std::string& extension_id) {
   valid_prefixes_.push_back(base::StringPrintf(
       kChromeExtensionSchemeUrlPattern, extension_id.c_str()));
   valid_prefixes_.push_back(base::StringPrintf(
       kChromiumDomainRedirectUrlPattern, extension_id.c_str()));
 }
 
 }  // namespace extensions