Calendar picker opens in the wrong position

Regression caused by r161426 which changed the behavior of window.moveTo.

BUG=328027

Review URL: https://codereview.chromium.org/112063005

git-svn-id: svn://svn.chromium.org/blink/trunk@163857 bbb929c8-8fbe-4397-9dbb-9b2b20218538