Roll third_party/externals/dawn 21d753a05346..635239faf8ef (7 commits)
Roll third_party/externals/dawn 21d753a05346..635239faf8ef (7 commits)

https://dawn.googlesource.com/dawn.git/+log/21d753a05346..635239faf8ef

git log 21d753a05346..635239faf8ef --date=short --first-parent --format='%ad %ae %s'
2020-04-23 brandon1.jones@intel.com Non-Local Residency 2: Implement Non-Local Management Logic
2020-04-23 cwallez@chromium.org Special-case GetDefaultQueue in the wire
2020-04-23 bryan.bernhart@intel.com D3D12: Fix UBO and sampler heap encoding test.
2020-04-23 enga@chromium.org Reland "Slab-allocate VkDescriptorSets"
2020-04-23 rafael.cintron@microsoft.com Use Ref<TextureBase> instead of TextureBase* in more places
2020-04-23 sgilhuly@chromium.org Use dawn_has_build in dawn_component
2020-04-23 cwallez@chromium.org Revert "Slab-allocate VkDescriptorSets"

Also rolling transitive DEPS:
  https://chromium.googlesource.com/external/github.com/google/shaderc ced9c72d005e..ced9c72d005e
  https://chromium.googlesource.com/chromium/src/third_party/jinja2 b41863e42637..b41863e42637
  https://chromium.googlesource.com/chromium/src/third_party/markupsafe 8f45f5cfa000..8f45f5cfa000
  https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang 3f4e5c456306..3f4e5c456306

Created with:
  gclient setdep -r third_party/externals/dawn@635239faf8ef

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 470c533e86f4f848c98c7e11fffc2d043494a401@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/+/master/autoroll/README.md

Bug: None
Tbr: 470c533e86f4f848c98c7e11fffc2d043494a401@google.com
Change-Id: I4b1bcab92c98e1ff60fe184e970699d1bb51f475
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/285248
Reviewed-by: skia-autoroll <e034c62197df5622a9c1bef8b3e012f87a0a9840@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <e034c62197df5622a9c1bef8b3e012f87a0a9840@skia-public.iam.gserviceaccount.com>

google/skia,google/skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia