[refactored] log to use named args
[refactored] log to use named args

Summary: Continuation of https://github.com/material-motion/material-motion-js/issues/193

Reviewers: O2 Material Motion, O3 Material JavaScript platform reviewers, #material_motion, vietanh

Reviewed By: #material_motion, vietanh

Tags: #material_motion

Differential Revision: http://codereview.cc/D3407

material-motion/material-motion-js,material-motion/material-motion-js,material-motion/material-motion-js