WebGPU: initDefaultUniformBlocks outside of an ASSERT initDefaultUniformBlocks was not being called in release builds and crashing when attempting to read the uniform layout info. Bug: angleproject:42267100 Change-Id: I9e13ffee1260e4f30aed24c7bfa9e767639a5c2b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5878925 Reviewed-by: Matthew Denton <mpdenton@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>