Roll src/third_party/angle/ 15443ebad..1776fd08e (1 commit)

https://chromium.googlesource.com/angle/angle.git/+log/15443ebad659..1776fd08e9f2

$ git log 15443ebad..1776fd08e --date=short --no-merges --format='%ad %ae %s'
2018-01-31 oetuaho Make use of CreateBoolNode in traversers

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=jmadill@chromium.org

Change-Id: I9fd521f1540805016bca9f66704f9f4db9d8387a
Reviewed-on: https://chromium-review.googlesource.com/897542
Commit-Queue: angle-chromium-autoroll <angle-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Reviewed-by: angle-chromium-autoroll <angle-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#533627}

DEPS

@@ -91,7 +91,7 @@ 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': '15443ebad659c5ad09ae88a09aba5ba03b6c4c1d',
+  'angle_revision': '1776fd08e9f2fff20a2c3ce68cd682c5eb7148c6',
   # 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.