In the declaration, callers, and in the {ConvertFloatToUint64} helper,
the parameter is called "fail". In the definition, it's wrongly called
"success".

R=ahaas@chromium.org

Change-Id: Iec861f182e54165e609c6e61d399ceb87512054f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1930900Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65142}