CL 2 of 4.
CL 2 of 4.

Use the one-way binding in the Polymer templates which is marginally faster, but still slow. This speeds up rendering of a populated query-sk element by 33%.

BUG=skia:

Review URL: https://codereview.chromium.org/1342163002

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot