RefCounted types should not have public destructors, webkit/

webkit/tools/test_shell/test_shell_webblobregistry_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.
 
 #ifndef WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_WEBBLOBREGISTRY_IMPL_H_
 #define WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_WEBBLOBREGISTRY_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebBlobRegistry.h"
 
@@ skipping 14 matching lines @@
 
   TestShellWebBlobRegistryImpl();
 
   // See WebBlobRegistry.h for documentation on these functions.
   virtual void registerBlobURL(const WebKit::WebURL& url,
                                WebKit::WebBlobData& data);
   virtual void registerBlobURL(const WebKit::WebURL& url,
                                const WebKit::WebURL& src_url);
   virtual void unregisterBlobURL(const WebKit::WebURL& url);
 
+ protected:
+  virtual ~TestShellWebBlobRegistryImpl() {}
+
  private:
   friend class base::RefCountedThreadSafe<TestShellWebBlobRegistryImpl>;
 
   // Run on I/O thread.
   void AddFinishedBlob(const GURL& url, webkit_blob::BlobData* blob_data);
   void CloneBlob(const GURL& url, const GURL& src_url);
   void RemoveBlob(const GURL& url);
 
   DISALLOW_COPY_AND_ASSIGN(TestShellWebBlobRegistryImpl);
 };
 
 #endif  // WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_WEBBLOBREGISTRY_IMPL_H_