Do not assign launch ordinals to ephemeral apps

apps/shell/browser/shell_app_sorting.h

 // Copyright 2013 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 APPS_SHELL_BROWSER_SHELL_APP_SORTING_H_
 #define APPS_SHELL_BROWSER_SHELL_APP_SORTING_H_
 
 #include "base/compiler_specific.h"
 #include "extensions/browser/app_sorting.h"
 
@@ skipping 35 matching lines @@
   virtual syncer::StringOrdinal GetPageOrdinal(
       const std::string& extension_id) const OVERRIDE;
   virtual void SetPageOrdinal(
       const std::string& extension_id,
       const syncer::StringOrdinal& new_page_ordinal) OVERRIDE;
   virtual void ClearOrdinals(const std::string& extension_id) OVERRIDE;
   virtual int PageStringOrdinalAsInteger(
       const syncer::StringOrdinal& page_ordinal) const OVERRIDE;
   virtual syncer::StringOrdinal PageIntegerAsStringOrdinal(
       size_t page_index) OVERRIDE;
-  virtual void MarkExtensionAsHidden(const std::string& extension_id) OVERRIDE;
+  virtual void SetExtensionVisible(const std::string& extension_id,
+                                   bool visible) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellAppSorting);
 };
 
 }  // namespace apps
 
 #endif  // APPS_SHELL_BROWSER_SHELL_APP_SORTING_H_