Enable custom MIME types in web copy/paste.

ui/base/clipboard/clipboard_util_win.h

 // 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.
 //
 // Some helper functions for working with the clipboard and IDataObjects.
 
 #ifndef UI_BASE_CLIPBOARD_CLIPBOARD_UTIL_WIN_H_
 #define UI_BASE_CLIPBOARD_CLIPBOARD_UTIL_WIN_H_
 #pragma once
 
@@ skipping 17 matching lines @@
   static FORMATETC* GetFilenameFormat();
   static FORMATETC* GetFilenameWFormat();
   // MS HTML Format
   static FORMATETC* GetHtmlFormat();
   // Firefox text/html
   static FORMATETC* GetTextHtmlFormat();
   static FORMATETC* GetCFHDropFormat();
   static FORMATETC* GetFileDescriptorFormat();
   static FORMATETC* GetFileContentFormatZero();
   static FORMATETC* GetWebKitSmartPasteFormat();
+  static FORMATETC* GetWebCustomDataFormat();
 
   /////////////////////////////////////////////////////////////////////////////
   // These methods check to see if |data_object| has the requested type.
   // Returns true if it does.
   static bool HasUrl(IDataObject* data_object);
   static bool HasFilenames(IDataObject* data_object);
   static bool HasPlainText(IDataObject* data_object);
   static bool HasFileContents(IDataObject* data_object);
   static bool HasHtml(IDataObject* data_object);
 
@@ skipping 20 matching lines @@
   static void CFHtmlExtractMetadata(const std::string& cf_html,
                                     std::string* base_url,
                                     size_t* html_start,
                                     size_t* fragment_start,
                                     size_t* fragment_end);
 };
 
 }
 
 #endif  // UI_BASE_CLIPBOARD_CLIPBOARD_UTIL_WIN_H_