Introduce XGetImage() for GrabWindowSnapshot() in ChromeOS.

BUG=119492
TEST=manually done

Review URL: https://chromiumcodereview.appspot.com/10386124

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@137556 0039d316-1c4b-4281-b951-d872f2087c98
ui::TouchEvent* RootWindow::CreateTouchEvent(ui::EventType type,
                                             const gfx::Point& location,
                                             int touch_id,
                                             base::TimeDelta time_stamp) {
  return new TouchEvent(type, location, touch_id, time_stamp);
}

ui::TouchEvent* RootWindow::CreateTouchEvent(ui::EventType type,
                                             const gfx::Point& location,
                                             int touch_id,
                                             base::TimeDelta time_stamp) {
  return new TouchEvent(type, location, touch_id, time_stamp);
}
