RefCounted types should not have public destructors, webkit/ edition

webkit/appcache/appcache_storage.h

Index: webkit/appcache/appcache_storage.h
diff --git a/webkit/appcache/appcache_storage.h b/webkit/appcache/appcache_storage.h
index 9f74a5919c37ba764a83adf60c0f027cd6099f1a..e30bd1cd487c8e1f311097d71f0e2758a842fcb8 100644
--- a/webkit/appcache/appcache_storage.h
+++ b/webkit/appcache/appcache_storage.h
@@ -36,8 +36,6 @@ class APPCACHE_EXPORT AppCacheStorage {
 
   class APPCACHE_EXPORT Delegate {
    public:
-    virtual ~Delegate() {}
-
     // If retrieval fails, 'collection' will be NULL.
     virtual void OnAllInfo(AppCacheInfoCollection* collection) {}
 
@@ -70,6 +68,9 @@ class APPCACHE_EXPORT AppCacheStorage {
         const GURL& url, const AppCacheEntry& entry,
         const GURL& namespace_entry_url, const AppCacheEntry& fallback_entry,
         int64 cache_id, int64 group_id, const GURL& mainfest_url) {}
+
+   protected:
+    virtual ~Delegate() {}
   };
 
   explicit AppCacheStorage(AppCacheService* service);