Roll src/third_party/angle a26de2500503..dc66ef9dc48b (3 commits)

https://chromium.googlesource.com/angle/angle.git/+log/a26de2500503..dc66ef9dc48b


git log a26de2500503..dc66ef9dc48b --date=short --no-merges --format='%ad %ae %s'
2018-06-28 lucferron@chromium.org Vulkan: Add simple test to trigger issue of buffer.write tests
2018-06-28 geofflang@chromium.org VK: Support pbuffer surfaces.
2018-06-28 jmadill@chromium.org Roll SPIRV-Tools and SPIRV-headers (June 2018)


Created with:
  gclient setdep -r src/third_party/angle@dc66ef9dc48b

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: I41c21a478cdae8bfb23fe992c2f8f6a53d40d12d
Reviewed-on: https://chromium-review.googlesource.com/1118569Reviewed-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@{#571165}

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': 'a26de2500503408425ad71aab2cf1d7919767f86',
+  'angle_revision': 'dc66ef9dc48ba5dc3cee675d2cea01ca906b293c',
   # 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.