Roll src/third_party/dawn/ 2960ec336..597e1587b (11 commits)

https://dawn.googlesource.com/dawn.git/+log/2960ec33667a..597e1587b4bf

$ git log 2960ec336..597e1587b --date=short --no-merges --format='%ad %ae %s'
2018-11-12 cwallez Build fuzzer tests in standalone builds too.
2018-11-12 cwallez Add a fuzzer for the wire server and Dawn frontend
2018-11-12 cwallez Fix compilation of SPIRV-Cross fuzzers in Chromium
2018-11-12 rharrison Add fuzzers for SPIRV-Cross
2018-11-12 cwallez Suppress tests failing on D3D12
2018-11-12 cwallez WireCmd: error out if "self" is null.
2018-11-09 jiawei.shao Skip BindGroupTests.ReusedUBO and UBOSamplerAndTexture on Metal
2018-11-07 cwallez Validate that mapped buffers aren't used in submits.
2018-11-07 cwallez Add tests for pass resource usage validation
2018-11-07 jiawei.shao Add entry points for creating a cube map/cube map array texture view
2018-11-04 senorblanco MSC build fix.

Created with:
  roll-dep src/third_party/dawn

TBR=kainino@chromium.org

Change-Id: I7e27100d2396478bdbaf24dbca9cd1ab64c70781
Reviewed-on: https://chromium-review.googlesource.com/c/1331403Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607428}

DEPS

@@ -240,7 +240,7 @@ 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': '2960ec33667a11bb4445dfe8154aef133c741afe',
+  'dawn_revision': '597e1587b4bfc7bf89895c7c879ae58b649da3c5',
 }
 
 # Only these hosts are allowed for dependencies in this DEPS file.