ui/base/dragdrop: Fix warnings found by clang chromium-style plugin on Windows.

ui/base/dragdrop/os_exchange_data_provider_win.cc

 // 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.
 
 #include "ui/base/dragdrop/os_exchange_data_provider_win.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
@@ skipping 608 matching lines @@
       destination->pstg->AddRef();
       break;
   }
 
   destination->tymed = source->tymed;
   destination->pUnkForRelease = source->pUnkForRelease;
   if (destination->pUnkForRelease)
     destination->pUnkForRelease->AddRef();
 }
 
+DataObjectImpl::StoredDataInfo::StoredDataInfo(const FORMATETC& format_etc,
+                                               STGMEDIUM* medium)
+    : format_etc(format_etc), medium(medium), owns_medium(true) {
+}
+
+DataObjectImpl::StoredDataInfo::~StoredDataInfo() {
+  if (owns_medium) {
+    ReleaseStgMedium(medium);
+    delete medium;
+  }
+  if (downloader.get())
+    downloader->Stop();
+}
+
 DataObjectImpl::DataObjectImpl()
     : is_aborting_(false),
       in_drag_loop_(false),
       in_async_mode_(false),
       async_operation_started_(false),
       observer_(NULL) {
 }
 
 DataObjectImpl::~DataObjectImpl() {
   StopDownloads();
@@ skipping 412 matching lines @@
 
 ///////////////////////////////////////////////////////////////////////////////
 // OSExchangeData, public:
 
 // static
 OSExchangeData::Provider* OSExchangeData::CreateProvider() {
   return new OSExchangeDataProviderWin();
 }
 
 }  // namespace ui