When referencing a pointer parameter with a 'let', but not using that
let.
Also fix a bunch of places where we used the old names for the pointer
transforms.
Bug: chromium:1433499
Change-Id: I8decefeacd6150bd6f7637f80e62b9cb62936235
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/127540
Kokoro: Kokoro <noreply+kokoro@google.com>
Auto-Submit: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Ben Clayton