Need to set the MICROSOFT_TABLETPENSERVICE_PROPERTY window property even for child windows

base/win/win_util.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 "base/win/win_util.h"
 
 #include <aclapi.h>
 #include <cfgmgr32.h>
 #include <lm.h>
 #include <powrprof.h>
 #include <shellapi.h>
 #include <shlobj.h>
 #include <shobjidl.h>  // Must be before propkey.
 #include <initguid.h>
 #include <inspectable.h>
 #include <propkey.h>
 #include <propvarutil.h>
 #include <psapi.h>
 #include <roapi.h>
 #include <sddl.h>
 #include <setupapi.h>
 #include <signal.h>
 #include <stddef.h>
 #include <stdlib.h>
+#include <tchar.h> // Must be before tpcshrd.h or for any use of _T macro
+#include <tpcshrd.h>
 #include <uiviewsettingsinterop.h>
 #include <windows.ui.viewmanagement.h>
 #include <winstring.h>
 #include <wrl/wrappers/corewrappers.h>
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 652 matching lines @@
       // more room is given to avoid multiple expensive calls to
       // ::EnumProcessModules() just because one module has been added.
       snapshot->resize(num_modules + 8, NULL);
     }
   } while (--retries_remaining);
 
   DLOG(ERROR) << "Failed to enumerate modules.";
   return false;
 }
 
+void EnableFlicks(HWND hwnd) {
+  ::RemoveProp(hwnd, MICROSOFT_TABLETPENSERVICE_PROPERTY);
+}
+
+void DisableFlicks(HWND hwnd) {
+  ::SetProp(hwnd, MICROSOFT_TABLETPENSERVICE_PROPERTY,
+      reinterpret_cast<HANDLE>(TABLET_DISABLE_FLICKS |
+          TABLET_DISABLE_FLICKFALLBACKKEYS));
+}
+
 }  // namespace win
 }  // namespace base