Several minor suppressions of flaky tests and rebaselines throughout
the day. Mostly able to keep the chromium.webkit bots green. A couple
of test failures at the end of the day which required one fix in
WebKit and one revert in Chromium.
Just committed roll to r146127 by hand;
https://codereview.chromium.org/12494031 .
It should be possible to roll to TOT (r146172) now; the
chromium.webkit bots should roll green.
-Ken