During the implementation of texture component swizzle in Dawn, we observed that the current proposal allows creating a texture view with a swizzle that only includes COPY_* usages.

Since a view inherits its texture's usages—and creating a view with only COPY_SRC is already possible—should we validate against creating a swizzled view that is limited to only COPY_* usages? Or shall we prevent views (not just swizzled views) to only include COPY_* usages?