aura-x11: Add custom web cursor support.

ui/base/cursor/cursor_win.cc

Index: ui/base/cursor/cursor_win.cc
diff --git a/ui/base/cursor/cursor_win.cc b/ui/base/cursor/cursor_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2d4aafea8d53de85435e45ac3bff1b27a78a188e
--- /dev/null
+++ b/ui/base/cursor/cursor_win.cc
@@ -0,0 +1,17 @@
+// 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 "ui/base/cursor/cursor.h"
+
+namespace ui {
+
+void Cursor::RefCustomCursor() {
+  // TODO(winguru):
+}
+
+void Cursor::UnrefCustomCursor() {
+  // TODO(winguru):
+}
+
+}  // namespace ui