Roll Dawn from a0758a1aef12 to 55f251dffe05 (1 revision)

https://dawn.googlesource.com/dawn.git/+log/a0758a1aef12..55f251dffe05

2020-11-18 cwallez@chromium.org RefBase: remove implicit conversion to bool.

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 kainino@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

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
Bug: None
Tbr: kainino@google.com
Change-Id: I0015294271a10f4342dae9cb5ee28da8f4bbc300
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2545992Reviewed-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@{#828667}

DEPS

@@ -324,7 +324,7 @@ 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': 'a0758a1aef12b02216c2df2781d8e1458d6d7da6',
+  'dawn_revision': '55f251dffe05a471f5979a315fa6fee54804e3b8',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.