x11: Do not listen for XI2 mouse events for X11Window.

X11 implementation of PlatformWindow does not correctly process XInput2
yet. So do not listen for mouse-events there.

BUG=none
R=sky@chromium.org

Review URL: https://codereview.chromium.org/394323002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283524 0039d316-1c4b-4281-b951-d872f2087c98

ui/platform_window/x11/x11_window.cc

@@ -100,9 +100,6 @@ void X11Window::Show() {
   XISetMask(mask, XI_TouchBegin);
   XISetMask(mask, XI_TouchUpdate);
   XISetMask(mask, XI_TouchEnd);
-  XISetMask(mask, XI_ButtonPress);
-  XISetMask(mask, XI_ButtonRelease);
-  XISetMask(mask, XI_Motion);
 
   XIEventMask evmask;
   evmask.deviceid = XIAllDevices;