Several parameter names of PromiseBuiltinsAssembler methods do not match
to its definition, which confuses readers of the code.

Change-Id: I8a43dd71b5a8d203cd040d754f8e650ecb203b82
Reviewed-on: https://chromium-review.googlesource.com/c/1476880Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59661}