Set Browser::app_name_ in a reasonable way for extension apps.

chrome/browser/ui/browser.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_UI_BROWSER_H_
 #define CHROME_BROWSER_UI_BROWSER_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 692 matching lines @@
                              int index);
   virtual void TabPinnedStateChanged(TabContentsWrapper* contents, int index);
   virtual void TabStripEmpty();
 
   // Figure out if there are tabs that have beforeunload handlers.
   bool TabsNeedBeforeUnloadFired();
 
  private:
   FRIEND_TEST_ALL_PREFIXES(BrowserTest, NoTabsInPopups);
   FRIEND_TEST_ALL_PREFIXES(BrowserTest, ConvertTabToAppShortcut);
+  FRIEND_TEST_ALL_PREFIXES(BrowserTest, OpenAppWindowLikeNtp);
+  FRIEND_TEST_ALL_PREFIXES(BrowserTest, AppIdSwitch);
 
   // Used to describe why a tab is being detached. This is used by
   // TabDetachedAtImpl.
   enum DetachType {
     // Result of TabDetachedAt.
     DETACH_TYPE_DETACH,
 
     // Result of TabReplacedAt.
     DETACH_TYPE_REPLACE,
 
@@ skipping 403 matching lines @@
   // and we install ourselves as an observer.
   TabRestoreService* tab_restore_service_;
 
   scoped_ptr<InstantController> instant_;
   scoped_ptr<InstantUnloadHandler> instant_unload_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_H_