exo: Add continuous drawing using skia to motion event client.

components/exo/wayland/BUILD.gn

 # 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.
 
 import("//build/config/linux/pkg_config.gni")
 import("//build/config/ui.gni")
 
 if (use_xkbcommon) {
   pkg_config("xkbcommon") {
     packages = [ "xkbcommon" ]
@@ skipping 70 matching lines @@
   ]
 }
 
 executable("wayland_motion_events") {
   sources = [
     "clients/motion_events.cc",
   ]
 
   deps = [
     "//base",
+    "//skia",
     "//third_party/wayland:wayland_client",
   ]
 }