Refactored app cache clear on exit code to happen in the object owning the files.

chrome/browser/appcache/chrome_appcache_service.h

Index: chrome/browser/appcache/chrome_appcache_service.h
diff --git a/chrome/browser/appcache/chrome_appcache_service.h b/chrome/browser/appcache/chrome_appcache_service.h
index dbc0616033ac1f179d9525bd3b32073c84ec9c2d..db2efdebcaa82bb8607a7fe91a502f896ca3a107 100644
--- a/chrome/browser/appcache/chrome_appcache_service.h
+++ b/chrome/browser/appcache/chrome_appcache_service.h
@@ -35,14 +35,15 @@ class ChromeAppCacheService
 
   void InitializeOnIOThread(
       const FilePath& profile_path, bool is_incognito,
-      scoped_refptr<HostContentSettingsMap> content_settings_map);
+      scoped_refptr<HostContentSettingsMap> content_settings_map,
+      bool clear_local_state_on_exit);
 
   // Helpers used by the extension service to grant and revoke
   // unlimited storage to app extensions.
   void SetOriginQuotaInMemory(const GURL& origin, int64 quota);
   void ResetOriginQuotaInMemory(const GURL& origin);
 
-  static void ClearLocalState(const FilePath& profile_path);
+  void SetClearLocalStateOnExit(bool clear_local_state);
 
  private:
   friend class BrowserThread;
@@ -62,6 +63,10 @@ class ChromeAppCacheService
 
   scoped_refptr<HostContentSettingsMap> host_contents_settings_map_;
   NotificationRegistrar registrar_;
+  // Protects the |clear_local_state_on_exit_| flag.
+  Lock lock_;
+  bool clear_local_state_on_exit_;
+  FilePath cache_path_;
 };
 
 #endif  // CHROME_BROWSER_APPCACHE_CHROME_APPCACHE_SERVICE_H_