Use XGrabPointer instead of XChangeActivatePointerGrab() to change the cursor during a pointer grab

ui/views/widget/desktop_aura/x11_pointer_grab.cc

Index: ui/views/widget/desktop_aura/x11_pointer_grab.cc
diff --git a/ui/views/widget/desktop_aura/x11_pointer_grab.cc b/ui/views/widget/desktop_aura/x11_pointer_grab.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2d22317343ace4c3e9c63e968ed33d9d4f3bc72d
--- /dev/null
+++ b/ui/views/widget/desktop_aura/x11_pointer_grab.cc
@@ -0,0 +1,21 @@
+// 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 "ui/views/widget/desktop_aura/x11_pointer_grab.h"
+
+#include <X11/Xlib.h>
+
+namespace views {
+
+int GrabPointer(XID window, bool owner_events, ::Cursor cursor) {
+  int event_mask = PointerMotionMask | ButtonReleaseMask | ButtonPressMask;
+  return XGrabPointer(gfx::GetXDisplay(), window, owner_events, event_mask,
+                      GrabModeAsync, GrabModeAsync, None, cursor, CurrentTime);
+}
+
+void UngrabPointer() {
+  XUngrabPointer(gfx::GetXDisplay(), CurrentTime);
+}
+
+}  // namespace views