clang fails compile on aura drag and drop code

ui/base/dragdrop/os_exchange_data_provider_aura.cc

 // 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.
 
 #include "ui/base/dragdrop/os_exchange_data_provider_aura.h"
 
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
 #include "net/base/net_util.h"
 
 namespace ui {
 
 OSExchangeDataProviderAura::OSExchangeDataProviderAura() : formats_(0) {}
 
+OSExchangeDataProviderAura::~OSExchangeDataProviderAura() {}
+
 void OSExchangeDataProviderAura::SetString(const string16& data) {
   string_ = data;
   formats_ |= OSExchangeData::STRING;
 }
 
 void OSExchangeDataProviderAura::SetURL(const GURL& url,
                                         const string16& title) {
   url_ = url;
   title_ = title;
   formats_ |= OSExchangeData::URL;
@@ skipping 135 matching lines @@
 }
 
 // static
 OSExchangeData::CustomFormat
 OSExchangeData::RegisterCustomFormat(const std::string& type) {
   // TODO(davemoore) Implement this for aura.
   return NULL;
 }
 
 }  // namespace ui