Roll ANGLE

https://chromium.googlesource.com/angle/angle.git/+log/5978e28d3adc..0492d4479799

Change-Id: I576dc57619434db7f7e3c82f97473b773307df3c
Reviewed-on: https://skia-review.googlesource.com/19447
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
2 files changed