Roll src/third_party/angle 639bc9086732..6a5d98c4b528 (2 commits)

https://chromium.googlesource.com/angle/angle.git/+log/639bc9086732..6a5d98c4b528


git log 639bc9086732..6a5d98c4b528 --date=short --no-merges --format='%ad %ae %s'
2018-07-19 jiawei.shao@intel.com ES31: Implement Vertex Attrib Binding on D3D11
2018-07-18 geofflang@chromium.org Vulkan: Disable the depth/stencil states when there are no depth/stencil buffers


Created with:
  gclient setdep -r src/third_party/angle@6a5d98c4b528

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=cwallez@chromium.org

Change-Id: I568d1fe855b0a6183728e749812ec0cc61eb372a
Reviewed-on: https://chromium-review.googlesource.com/1142175Reviewed-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@{#576426}

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': '639bc90867325cfcc95b9365c66b6128fcd1b654',
+  'angle_revision': '6a5d98c4b528a55491047b0217d3aedf0b9c8705',
   # 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.