Make ValidationUtils flexible for other generation.
BUG=dawn:1201
Change-Id: I42ccbd3d9c2fe37abec4b8f7eb395583dbe1dc8d
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/72980
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Junwei Fu <junwei.fu@intel.com>
The error type will help distinguish between validation errors, context
losts and others which should be handled differently.
Take advantage of advantage of this to change DAWN_RETURN_ERROR to
"return DAWN_FOO_ERROR" to have the return be more explicit. Also
removes usage of DAWN_TRY_ASSERT for more explicit checks.
Change-Id: Icbce16b0c8d8eb084b0af2fc132acee776909a36