Eliminate HICON leaks caused by creating icons from bitmap image.

content/common/cursors/webcursor_aurawin.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 "content/common/cursors/webcursor.h"
 
 #include <windows.h>
 
 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
 #include "ui/gfx/icon_util.h"
@@ skipping 12 matching lines @@
   CreateScaledBitmapAndHotspotFromCustomData(&bitmap, &hotspot);
 
   gfx::Size custom_size;
   std::vector<char> custom_data;
   CreateCustomData(bitmap, &custom_data, &custom_size);
 
   custom_cursor_ = IconUtil::CreateCursorFromDIB(
       custom_size,
       hotspot,
       !custom_data.empty() ? &custom_data[0] : NULL,
-      custom_data.size());
+      custom_data.size())
+      .release();
   return custom_cursor_;
 }
 
 void WebCursor::InitPlatformData() {
   custom_cursor_ = NULL;
 }
 
 bool WebCursor::SerializePlatformData(base::Pickle* pickle) const {
   return true;
 }
@@ skipping 10 matching lines @@
   if (custom_cursor_) {
     DestroyIcon(custom_cursor_);
     custom_cursor_ = NULL;
   }
 }
 
 void WebCursor::CopyPlatformData(const WebCursor& other) {
 }
 
 }  // namespace content