Move TabStripModelDelegate off Browser into its own class.

chrome/browser/ui/views/ash/chrome_shell_delegate.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/ash/chrome_shell_delegate.h"
 
 #include "ash/launcher/launcher_types.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/wm/partial_screenshot_view.h"
 #include "ash/wm/window_util.h"
@@ skipping 196 matching lines @@
 void ChromeShellDelegate::RestoreTab() {
   Browser* browser = GetTargetBrowser();
   // Do not restore tabs while in the incognito mode.
   if (browser->profile()->IsOffTheRecord())
     return;
   TabRestoreService* service =
       TabRestoreServiceFactory::GetForProfile(browser->profile());
   if (!service)
     return;
   if (service->IsLoaded()) {
-    browser->RestoreTab();
+    chrome::RestoreTab(browser);
   } else {
     service->LoadTabsFromLastSession();
     // LoadTabsFromLastSession is asynchronous, so TabRestoreService has not
     // finished loading the entries at this point. Wait for next event cycle
     // which loads the restored tab entries.
     MessageLoop::current()->PostTask(
         FROM_HERE,
         base::Bind(&ChromeShellDelegate::RestoreTab,
                    weak_factory_.GetWeakPtr()));
   }
@@ skipping 105 matching lines @@
       ash::Shell::GetInstance()->CreateLauncher();
       break;
     default:
       NOTREACHED() << "Unexpected notification " << type;
   }
 #else
   // MSVC++ warns about switch statements without any cases.
   NOTREACHED() << "Unexpected notification " << type;
 #endif
 }