Roll Vulkan-ValidationLayers from 171e04fac342 to c0bf676837e4 (3 revisions)
Roll Vulkan-ValidationLayers from 171e04fac342 to c0bf676837e4 (3 revisions)

https://chromium.googlesource.com/external/github.com/KhronosGroup/Vulkan-ValidationLayers.git/+log/171e04fac342..c0bf676837e4

2020-07-28 jzulauf@lunarg.com syncval: Update 'most recent' explanation
2020-07-28 sam.walls@arm.com tests: add tests for PerfDoc checks 18-20
2020-07-28 sam.walls@arm.com practices: add PerfDoc checks 18-20 with SPIRV analysis

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/vulkan-validation-layers-angle-autoroll
Please CC c15ba1c6ec8841cd136fafb26b333b1f76c86fb4@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

Bug: None
Tbr: c15ba1c6ec8841cd136fafb26b333b1f76c86fb4@google.com
Change-Id: I6b6b1620925aab4c7cbf35e6b08ef2ba8d6f2420
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2325650
Reviewed-by: angle-autoroll <09ea9b8bac6cceb6ec3b72e615745c3a1e982ce2@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <09ea9b8bac6cceb6ec3b72e615745c3a1e982ce2@skia-public.iam.gserviceaccount.com>

ppy/angle,ppy/angle,ppy/angle,ppy/angle