The single file was taking too long to compile, and was becoming
difficult to work in.
Bug: tint:1711
Change-Id: Ibaaa5dd72aef02cdffe80156848d010ff84c9553
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/105740
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>