Make TabContents ctor private; poke hole for existing callers.

chrome/browser/ui/tab_contents/tab_contents.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/tab_contents/tab_contents.h"
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "chrome/browser/autofill/autocomplete_history_manager.h"
 #include "chrome/browser/autofill/autofill_external_delegate.h"
@@ skipping 64 matching lines @@
 
  private:
   TabContents* tab_contents_;  // unowned
 };
 
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // TabContents, public:
 
+// static
+TabContents* TabContents::Factory::CreateTabContents(WebContents* contents) {
+  return new TabContents(contents);
+}
+
+// static
+TabContents* TabContents::Factory::CloneTabContents(TabContents* contents) {
+  return contents->Clone();
+}
+
 TabContents::TabContents(WebContents* contents)
     : content::WebContentsObserver(contents),
       in_destructor_(false),
       web_contents_(contents) {
   DCHECK(contents);
   DCHECK(!FromWebContents(contents));
 
   chrome::SetViewType(contents, chrome::VIEW_TYPE_TAB_CONTENTS);
 
   // Stash this in the WebContents.
@@ skipping 169 matching lines @@
 #if defined(ENABLE_SESSION_SERVICE)
   SessionService* session =
       SessionServiceFactory::GetForProfile(profile());
   if (session) {
     session->SetTabUserAgentOverride(restore_tab_helper()->window_id(),
                                      restore_tab_helper()->session_id(),
                                      user_agent);
   }
 #endif
 }