Roll src/third_party/angle/ 647dca767..a2d981418 (1 commit)

https://chromium.googlesource.com/angle/angle.git/+log/647dca7672f7..a2d981418d78

$ git log 647dca767..a2d981418 --date=short --no-merges --format='%ad %ae %s'
2017-12-15 oetuaho Fix allowing non-constant ternary global initializer

Created with:
  roll-dep src/third_party/angle


The AutoRoll server is located here: https://angle-chromium-roll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
TBR=ynovikov@chromium.org

Change-Id: Iec7b17bd0ff1703f8867cffe37e738fd69268452
Reviewed-on: https://chromium-review.googlesource.com/831846Reviewed-by: angle-deps-roller . <angle-deps-roller@chromium.org>
Commit-Queue: angle-deps-roller . <angle-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524679}

DEPS

@@ -86,7 +86,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ANGLE
   # and whatever else without interference from each other.
-  'angle_revision': '647dca7672f709d2cc3896c5ffb2fd9b904a15e4',
+  'angle_revision': 'a2d981418d78120269dfe7960578f7b7b82680aa',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling build tools
   # and whatever else without interference from each other.