Roll src/third_party/angle 1bd4bfb0c2d8..b983a4b28b83 (2 commits)

https://chromium.googlesource.com/angle/angle.git/+log/1bd4bfb0c2d8..b983a4b28b83


git log 1bd4bfb0c2d8..b983a4b28b83 --date=short --no-merges --format='%ad %ae %s'
2018-08-07 jmadill@chromium.org Pass Context to Framebuffer::invalidateCompletenessCache.
2018-08-07 jmadill@chromium.org Remove excess gl:: prefixing in validationES.cpp.


Created with:
  gclient setdep -r src/third_party/angle@b983a4b28b83

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=luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
TBR=ynovikov@chromium.org

Change-Id: Id7a4cfa3b1403fde12b1fc946eb2a42643dd4d74
Reviewed-on: https://chromium-review.googlesource.com/1165523Reviewed-by: angle-chromium-autoroll <angle-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: angle-chromium-autoroll <angle-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#581310}

DEPS

@@ -117,7 +117,7 @@ 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': '1bd4bfb0c2d876ab29a7fef9bd89df72593817a0',
+  'angle_revision': 'b983a4b28b8317faa289406f78a236ff54d26590',
   # 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.