Remove TYPE_EXTENSION_APP. Experiment failed.

chrome/browser/extensions/extension_tabs_module.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_tabs_module.h"
 
 #include "base/base64.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 1072 matching lines @@
 
   if (error_message)
     *error_message = ExtensionErrorUtils::FormatErrorMessage(
         keys::kTabNotFoundError, base::IntToString(tab_id));
 
   return false;
 }
 
 static std::string GetWindowTypeText(Browser::Type type) {
   // Note: for app popups, we report "app".
-  if ((type & Browser::TYPE_APP) != 0 || type == Browser::TYPE_EXTENSION_APP)
+  if ((type & Browser::TYPE_APP) != 0)
     return keys::kWindowTypeValueApp;
   if ((type & Browser::TYPE_POPUP) != 0)
     return keys::kWindowTypeValuePopup;
 
   DCHECK(type == Browser::TYPE_NORMAL);
   return keys::kWindowTypeValueNormal;
 }
 
 static GURL ResolvePossiblyRelativeURL(std::string url_string,
                                        Extension* extension) {
   GURL url = GURL(url_string);
   if (!url.is_valid())
     url = extension->GetResourceURL(url_string);
 
   return url;
 }