Make TabContents ctor private; poke hole for existing callers.

chrome/browser/ui/views/external_tab_container_win.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/external_tab_container_win.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 176 matching lines @@
   // TODO(jcampan): limit focus traversal to contents.
 
   prop_.reset(new ViewProp(GetNativeView(), kWindowObjectKey, this));
 
   if (existing_contents) {
     tab_contents_.reset(existing_contents);
     tab_contents_->web_contents()->GetController().SetBrowserContext(profile);
   } else {
     WebContents* new_contents = WebContents::Create(
         profile, NULL, MSG_ROUTING_NONE, NULL);
-    tab_contents_.reset(new TabContents(new_contents));
+    tab_contents_.reset(TabContents::Factory::CreateTabContents(new_contents));
   }
 
   if (!infobars_enabled)
     tab_contents_->infobar_tab_helper()->set_infobars_enabled(false);
 
   tab_contents_->web_contents()->SetDelegate(this);
 
   tab_contents_->web_contents()->
       GetMutableRendererPrefs()->browser_handles_non_local_top_level_requests =
           handle_top_level_requests;
@@ skipping 274 matching lines @@
     // Reuse the same tab handle here as the new container instance is a dummy
     // instance which does not have an automation client connected at the other
     // end.
     new_container = new TemporaryPopupExternalTabContainerWin(
         automation_, automation_resource_message_filter_.get());
     new_container->SetTabHandle(tab_handle_);
   }
 
   // Make sure that ExternalTabContainer instance is initialized with
   // an unwrapped Profile.
-  scoped_ptr<TabContents> tab_contents(new TabContents(new_contents));
+  scoped_ptr<TabContents> tab_contents(
+      TabContents::Factory::CreateTabContents(new_contents));
   bool result = new_container->Init(
       tab_contents->profile()->GetOriginalProfile(),
       NULL,
       initial_pos,
       WS_CHILD,
       load_requests_via_automation_,
       handle_top_level_requests_,
       tab_contents.get(),
       GURL(),
       GURL(),
@@ skipping 751 matching lines @@
   if (params.disposition == CURRENT_TAB) {
     DCHECK(route_all_top_level_navigations_);
     forward_params.disposition = NEW_FOREGROUND_TAB;
   }
   WebContents* new_contents =
       ExternalTabContainerWin::OpenURLFromTab(source, forward_params);
   // support only one navigation for a dummy tab before it is killed.
   ::DestroyWindow(GetNativeView());
   return new_contents;
 }