Make the native select menu work on Linux touch screen

ui/views/widget/desktop_aura/x11_pointer_grab.cc

 // Copyright 2015 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/logging.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/events/devices/x11/device_data_manager_x11.h"
 #include "ui/views/widget/desktop_aura/x11_pointer_grab.h"
 
 #include <X11/extensions/XInput2.h>
@@ skipping 14 matching lines @@
 int GrabPointer(XID window, bool owner_events, ::Cursor cursor) {
   int result = GrabInvalidTime;
   if (ui::IsXInput2Available()) {
     // Do an XInput2 pointer grab. If there is an active XInput2 pointer grab
     // as a result of normal button press, XGrabPointer() will fail.
     unsigned char mask[XIMaskLen(XI_LASTEVENT)];
     memset(mask, 0, sizeof(mask));
     XISetMask(mask, XI_ButtonPress);
     XISetMask(mask, XI_ButtonRelease);
     XISetMask(mask, XI_Motion);
+    XISetMask(mask, XI_TouchBegin);
+    XISetMask(mask, XI_TouchUpdate);
+    XISetMask(mask, XI_TouchEnd);
     XIEventMask evmask;
     evmask.mask_len = sizeof(mask);
     evmask.mask = mask;
 
     const std::vector<int>& master_pointers =
         ui::DeviceDataManagerX11::GetInstance()->master_pointers();
     for (int master_pointer : master_pointers) {
       evmask.deviceid = master_pointer;
       result = XIGrabDevice(
           gfx::GetXDisplay(), master_pointer, window, CurrentTime, cursor,
@@ skipping 32 matching lines @@
     const std::vector<int>& master_pointers =
         ui::DeviceDataManagerX11::GetInstance()->master_pointers();
     for (int master_pointer : master_pointers)
       XIUngrabDevice(gfx::GetXDisplay(), master_pointer, CurrentTime);
   }
   // Try core pointer ungrab in case the XInput2 pointer ungrab failed.
   XUngrabPointer(gfx::GetXDisplay(), CurrentTime);
 }
 
 }  // namespace views