tree 1e89721446acf22b573f9bb15a66df6241435d2b
parent 2987f3c04d9b4f401dbe4fac6a52832ff90f17aa
author Zhaoming Jiang <zhaoming.jiang@microsoft.com> 1749091835 -0700
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1749091835 -0700

Dawn: Support streaming ShaderModuleParseResult

This CL add StreamOut support for std::optional, and add a wrapper
UnsafeUnserializedValue to replace CacheKey::UnsafeUnkeyedValue and hold
unserializable value that will do nothing when streaming in and will set
to default constructed value when streamed out to.
These help making ShaderModuleParseResult serializable for shader
module blob cache.

Bug: 42240459, 402772740
Change-Id: Ic6199e46a1be34c4d03047af361dfab1ef807817
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/244094
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Zhaoming Jiang <zhaoming.jiang@microsoft.com>