Rename nacl::RefCounted to nacl::RefCountedThreadSafe

ppapi/native_client/src/shared/ppapi_proxy/array_buffer_proxy_var.h

 // Copyright (c) 2012 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 NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_ARRAY_BUFFER_PROXY_VAR_H_
 #define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_ARRAY_BUFFER_PROXY_VAR_H_
 
 #include "native_client/src/include/nacl_memory.h"
 #include "native_client/src/shared/ppapi_proxy/proxy_var.h"
 
@@ skipping 16 matching lines @@
       SharedProxyVar proxy_var) {
     if (proxy_var == NULL ||
         proxy_var->pp_var_type() != PP_VARTYPE_ARRAY_BUFFER) {
       scoped_refptr<ArrayBufferProxyVar> null_ptr;
       return null_ptr;
     }
     return scoped_refptr<ArrayBufferProxyVar>(
         static_cast<ArrayBufferProxyVar*>(proxy_var.get()));
   }
 
+ protected:
+  virtual ~ArrayBufferProxyVar() {}
+
  private:
   std::vector<uint8_t> buffer_;
 };
 
 typedef scoped_refptr<ArrayBufferProxyVar> SharedArrayBufferProxyVar;
 
 }  // namespace ppapi_proxy
 
 #endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_ARRAY_BUFFER_PROXY_VAR_H_