Move TabStripModelDelegate off Browser into its own class.

chrome/browser/ui/startup/startup_browser_creator_impl.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/startup/startup_browser_creator_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/environment.h"
@@ skipping 696 matching lines @@
     params.tabstrip_index = index;
     params.tabstrip_add_types = add_types;
     params.extension_app_id = tabs[i].app_id;
     chrome::Navigate(&params);
 
     first_tab = false;
   }
   if (!chrome::GetActiveWebContents(browser)) {
     // TODO: this is a work around for 110909. Figure out why it's needed.
     if (!browser->tab_count())
-      browser->AddBlankTab(true);
+      chrome::AddBlankTab(browser, true);
     else
       chrome::ActivateTabAt(browser, 0, false);
   }
 
   browser->window()->Show();
   // TODO(jcampan): http://crbug.com/8123 we should not need to set the initial
   //                focus explicitly.
   chrome::GetActiveWebContents(browser)->GetView()->SetInitialFocus();
 
   return browser;
@@ skipping 133 matching lines @@
         // New:
         prefs->GetString(prefs::kHomePage),
         prefs->GetBoolean(prefs::kHomePageIsNewTabPage),
         prefs->GetBoolean(prefs::kShowHomeButton),
         // Backup:
         backup_homepage,
         backup_homepage_is_ntp,
         backup_show_home_button));
   }
 }