Roll Dawn from 6a7095d8c753 to a827aa2c29aa (3 revisions)

https://dawn.googlesource.com/dawn.git/+log/6a7095d8c753..a827aa2c29aa

2020-12-01 shaobo.yan@intel.com CopyTextureForBrowser: Use large triangle to avoid arithmetic precision
2020-11-30 cwallez@chromium.org Roll glslang and shaderc
2020-11-30 enga@chromium.org Update RenderPassLoadOpTests to use WGSL

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 dsinclair@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: dsinclair@google.com
Change-Id: I5d03f3f6d8fb2be0fe5f5309e337782852d042d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2567550Reviewed-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@{#832212}

DEPS

@@ -327,7 +327,7 @@ 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': '6a7095d8c75373e363d52faed3c74f517ca7311f',
+  'dawn_revision': 'a827aa2c29aa41346e95e6ac58a752709beb5977',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.