AppCaches which belong to hosted apps are not protected from deletion

chrome/browser/browser_shutdown.cc

 // Copyright (c) 2011 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/browser_shutdown.h"
 
 #include <map>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 162 matching lines @@
   }
 
   prefs->SavePersistentPrefs();
 
 #if defined(OS_WIN) && defined(GOOGLE_CHROME_BUILD)
   // Cleanup any statics created by RLZ. Must be done before NotificationService
   // is destroyed.
   RLZTracker::CleanupRlz();
 #endif
 
+  profile_manager->ClearAppCaches();
+
   // The jank'o'meter requires that the browser process has been destroyed
   // before calling UninstallJankometer().
   delete g_browser_process;
   g_browser_process = NULL;
 #if defined(OS_CHROMEOS)
   chromeos::BootTimesLoader::Get()->AddLogoutTimeMarker("BrowserDeleted",
                                                         true);
 #endif
 
   // Uninstall Jank-O-Meter here after the IO thread is no longer running.
@@ skipping 136 matching lines @@
 
 bool ShuttingDownWithoutClosingBrowsers() {
 #if defined(USE_X11)
   if (GetShutdownType() == browser_shutdown::END_SESSION)
     return true;
 #endif
   return false;
 }
 
 }  // namespace browser_shutdown