Roll src/third_party/dawn 7f426898efe0..31bde9585709 (1 commits)

https://dawn.googlesource.com/dawn.git/+log/7f426898efe0..31bde9585709

git log 7f426898efe0..31bde9585709 --date=short --no-merges --format='%ad %ae %s'
2019-10-17 enga@chromium.org perf_tests: Replace WaitForGPU with maxStepsInFlight argument

Created with:
  gclient setdep -r src/third_party/dawn@31bde9585709

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dawn-chromium-autoroll
Please CC cwallez@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/+/master/autoroll/README.md

CQ_INCLUDE_TRYBOTS=luci.chromium.try:dawn-linux-x64-deps-rel;luci.chromium.try:dawn-mac-x64-deps-rel;luci.chromium.try:dawn-win10-x64-deps-rel;luci.chromium.try:dawn-win10-x86-deps-rel
TBR=cwallez@google.com

Bug: None
Change-Id: I1741c81ea8ecbdff7ed22796e9490754e690c137
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865046Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#706791}

DEPS

@@ -302,7 +302,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
-  'dawn_revision': '7f426898efe02309b4a0d4589a2f10394c2a62ff',
+  'dawn_revision': '31bde95857091cdcb940abb073ebf2ea09b3e89a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.