Roll Dawn from 450b6f4f844d to 7f4980e7d265 (5 revisions)

https://dawn.googlesource.com/dawn.git/+log/450b6f4f844d..7f4980e7d265

2020-07-17 tommek@google.com Optimizing WriteTexture offset on Vulkan
2020-07-17 tommek@google.com Changing validation order for linear texture data
2020-07-17 hao.x.li@intel.com Query API: ResolveQuerySet
2020-07-17 jiawei.shao@intel.com Implement buffer lazy initialization before mapping
2020-07-17 tommek@google.com Optimizing WriteTexture row pitch on Vulkan

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/+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: cwallez@google.com
Change-Id: Ib5ee56da74ca0e7f9ae7795f626bf74e1dd4e9cc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2304374Reviewed-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@{#789485}

DEPS

@@ -322,7 +322,7 @@ 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': '450b6f4f844dab9417e54f08adf5b9d2ad30d1d7',
+  'dawn_revision': '7f4980e7d265d3f2e984dd316dccdb28a9dd86bf',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.