Clear the clipboard closing Incognito window

ui/base/clipboard/clipboard_util_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/clipboard/clipboard_util_win.h"
 
 #include <shellapi.h>
 #include <shlwapi.h>
 #include <wininet.h>  // For INTERNET_MAX_URL_LENGTH.
 
@@ skipping 207 matching lines @@
   return &format;
 }
 
 FORMATETC* ClipboardUtil::GetPepperCustomDataFormat() {
   static UINT cf =
       RegisterClipboardFormat(L"Chromium Pepper MIME Data Format");
   static FORMATETC format = {cf, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
   return &format;
 }
 
+FORMATETC* ClipboardUtil::GetSourceTagFormat() {
+  static UINT cf =
+      RegisterClipboardFormat(L"Chromium Source tag Format");
+  static FORMATETC format = {cf, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
+  return &format;
+}
+
 bool ClipboardUtil::HasUrl(IDataObject* data_object) {
   DCHECK(data_object);
   return SUCCEEDED(data_object->QueryGetData(GetMozUrlFormat())) ||
       SUCCEEDED(data_object->QueryGetData(GetUrlWFormat())) ||
       SUCCEEDED(data_object->QueryGetData(GetUrlFormat())) ||
       SUCCEEDED(data_object->QueryGetData(GetFilenameWFormat())) ||
       SUCCEEDED(data_object->QueryGetData(GetFilenameFormat()));
 }
 
 bool ClipboardUtil::HasFilenames(IDataObject* data_object) {
@@ skipping 354 matching lines @@
           end_fragment_start + end_fragment_str.length()));
     }
   } else {
     *fragment_start = cf_html.find('>', tag_start) + 1;
     size_t tag_end = cf_html.rfind("<!--EndFragment", std::string::npos);
     *fragment_end = cf_html.rfind('<', tag_end);
   }
 }
 
 }  // namespace ui