Roll dawn from ff90599cdf60 to b231c7fb717d (5 revisions)

https://dawn.googlesource.com/dawn.git/+log/ff90599cdf60..b231c7fb717d

2020-06-29 cwallez@chromium.org Null: Make Increment/DecrementMemoryUsage use uint64_t.
2020-06-29 yunchao.he@intel.com Fix a bug in PassResourceUsageTracker.cpp
2020-06-29 tommek@google.com Caching empty bind group layouts
2020-06-29 bryan.bernhart@intel.com D3D12: Remove ComPtr from d3d12::Buffer::GetD3D12Resource
2020-06-29 jiawei.shao@intel.com Enable two cases in TextureZeroInitTests with swiftshader

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dawn-skia-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: skia/skia.primary:Build-Debian10-Clang-x86_64-Debug-Dawn
Bug: None
Tbr: cwallez@google.com
Change-Id: I584bf523a7bee7da0309e6040feec65a57c2cb5d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/299800
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index f20ee5e..7f98538 100644
--- a/DEPS
+++ b/DEPS
@@ -10,7 +10,7 @@
   "third_party/externals/angle2"          : "https://chromium.googlesource.com/angle/angle.git@69c011ef35f18eee951e75d7979c611f41271c9e",
   # Dawn requires jinja2 and markupsafe for the code generator, and glslang and shaderc for SPIRV compilation.
   # When the Dawn revision is updated these should be updated from the Dawn DEPS as well.
-  "third_party/externals/dawn"            : "https://dawn.googlesource.com/dawn.git@ff90599cdf600e48d5868f8b3d35698686f5b161",
+  "third_party/externals/dawn"            : "https://dawn.googlesource.com/dawn.git@b231c7fb717d13dc5b15f4ab34527cff198fd17b",
   "third_party/externals/glslang"         : "https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang@839704450200e407490c538418f4d1a493b789ab",
   "third_party/externals/jinja2"          : "https://chromium.googlesource.com/chromium/src/third_party/jinja2@b41863e42637544c2941b574c7877d3e1f663e25",
   "third_party/externals/markupsafe"      : "https://chromium.googlesource.com/chromium/src/third_party/markupsafe@8f45f5cfa0009d2a70589bcda0349b8cb2b72783",