Fix grabbing capture when the mouse is pressed on Desktop Linux.

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
index 3c992813568aa97c66c5617ef3a75b1be63f99dd..736129d9f477c4008b734a9378f0f83dcaba3284 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
@@ -956,10 +956,7 @@ void DesktopWindowTreeHostX11::SetCapture() {
   if (old_capturer)
     old_capturer->OnHostLostWindowCapture();
 
-  unsigned int event_mask = PointerMotionMask | ButtonReleaseMask |
-                            ButtonPressMask;
-  XGrabPointer(xdisplay_, xwindow_, True, event_mask, GrabModeAsync,
-               GrabModeAsync, None, None, CurrentTime);
+  ui::GrabPointer(xwindow_, true, None);
 }
 
 void DesktopWindowTreeHostX11::ReleaseCapture() {
@@ -968,7 +965,7 @@ void DesktopWindowTreeHostX11::ReleaseCapture() {
     // the topmost window underneath the mouse so the capture release being
     // asynchronous is likely inconsequential.
     g_current_capture = NULL;
-    XUngrabPointer(xdisplay_, CurrentTime);
+    ui::UngrabPointer();
 
     OnHostLostWindowCapture();
   }