AppCaches which belong to hosted apps are not protected from deletion

chrome/browser/profiles/profile_manager.h

 // 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.
 
 // This class keeps track of the currently-active profiles in the runtime.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_MANAGER_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_MANAGER_H_
 #pragma once
 
@@ skipping 140 matching lines @@
   // Returns a ProfileInfoCache object which can be used to get information
   // about profiles without having to load them from disk.
   ProfileInfoCache& GetProfileInfoCache();
 
   // Schedules the profile at the given path to be deleted on shutdown.
   void ScheduleProfileForDeletion(const FilePath& profile_dir);
 
   // Checks if multiple profiles is enabled.
   static bool IsMultipleProfilesEnabled();
 
+  // Clears app caches related to all profiles and waits for the operation to
+  // complete.
+  void ClearAppCaches();
+
  protected:
   // Does final initial actions.
   virtual void DoFinalInit(Profile* profile);
 
  private:
   friend class ExtensionEventRouterForwarderTest;
 
   // This struct contains information about profiles which are being loaded or
   // were loaded.
   struct ProfileInfo {
@@ skipping 57 matching lines @@
 };
 
 // Same as the ProfileManager, but doesn't initialize some services of the
 // profile. This one is useful in unittests.
 class ProfileManagerWithoutInit : public ProfileManager {
  protected:
   virtual void DoFinalInit(Profile*) {}
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_MANAGER_H_