Replaces random identifiers used as function names in calls with the
names of builtin functions.
Fixes: tint:1617.
Change-Id: I4e70276c9023bcb35b860c98fca6a95dc284f60a
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/96580
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Alastair Donaldson <allydonaldson@googlemail.com>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>