Add D3D12 pipeline caching impl: store cachedPSO blob in cached blob.
Record root signature ID3DBlob in cache key together with
D3D_SHADER_BYTECODE, D3D12_GRAPHICS_PIPELINE_STATE_DESC or
D3D12_COMPUTE_PIPELINE_STATE_DESC.
Shader caching is not added.
Add some pipeline caching negative tests.
Bug: dawn:549
Change-Id: Id1cb560b49f1cf495860e2e0bcf92d8d988c5379
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/91180
Auto-Submit: Shrek Shao <shrekshao@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Loko Kung <lokokung@google.com>
Commit-Queue: Austin Eng <enga@chromium.org>
shrekshao