AppCaches which belong to hosted apps are not protected from deletion

chrome/browser/profiles/profile_impl.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 gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 #pragma once
 
@@ skipping 14 matching lines @@
 class SpellCheckHostMetrics;
 
 #if defined(OS_CHROMEOS)
 namespace chromeos {
 class EnterpriseExtensionObserver;
 class LocaleChangeGuard;
 class Preferences;
 }
 #endif
 
+namespace base {
+class WaitableEvent;
+}
+
 class NetPrefObserver;
 
 // The default profile implementation.
 class ProfileImpl : public Profile,
                     public SpellCheckHostObserver,
                     public NotificationObserver {
  public:
   virtual ~ProfileImpl();
 
   static void RegisterUserPrefs(PrefService* prefs);
@@ skipping 86 matching lines @@
 #if defined(OS_CHROMEOS)
   virtual void ChangeAppLocale(const std::string& locale, AppLocaleChangedVia);
   virtual void OnLogin();
   virtual void SetupChromeOSEnterpriseExtensionObserver();
   virtual void InitChromeOSPreferences();
 #endif  // defined(OS_CHROMEOS)
 
   virtual PrefProxyConfigTracker* GetProxyConfigTracker();
   virtual prerender::PrerenderManager* GetPrerenderManager();
 
+  virtual base::WaitableEvent* ClearAppCache();
+
   // NotificationObserver implementation.
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
   // SpellCheckHostObserver implementation.
   virtual void SpellCheckHostInitialized();
 
  private:
   friend class Profile;
@@ skipping 144 matching lines @@
   scoped_refptr<PrefProxyConfigTracker> pref_proxy_config_tracker_;
 
   scoped_ptr<ChromeURLDataManager> chrome_url_data_manager_;
 
   Profile::Delegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileImpl);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_