RefCounted types should not have public destructors, webkit/

webkit/tools/test_shell/simple_file_writer.cc

Index: webkit/tools/test_shell/simple_file_writer.cc
diff --git a/webkit/tools/test_shell/simple_file_writer.cc b/webkit/tools/test_shell/simple_file_writer.cc
index 86be501862125da1e731eb3841e5d96a7a578560..6689bf1b4916f1a789020002f51007ef2057ff0d 100644
--- a/webkit/tools/test_shell/simple_file_writer.cc
+++ b/webkit/tools/test_shell/simple_file_writer.cc
@@ -40,9 +40,6 @@ class SimpleFileWriter::IOThreadProxy
     main_thread_ = base::MessageLoopProxy::current();
   }
 
-  virtual ~IOThreadProxy() {
-  }
-
   void Truncate(const GURL& path, int64 offset) {
     if (!io_thread_->BelongsToCurrentThread()) {
       io_thread_->PostTask(
@@ -85,6 +82,9 @@ class SimpleFileWriter::IOThreadProxy
   }
 
  private:
+  friend class base::RefCountedThreadSafe<IOThreadProxy>;
+  virtual ~IOThreadProxy() {}
+
   FileSystemOperationInterface* GetNewOperation(const GURL& path) {
     return file_system_context_->CreateFileSystemOperation(path, io_thread_);
   }