[zlib] Improve variable name

A parameter named "b" is not descriptive.
However, by context that variable's meaning is clear.
void ContinueOnError(bool b); clearly means |b| indicates whether or not
to continue.

Nevertheless, it is probably wise to provide a better name for that
variable.

This (profoundly nitpicky) commit renames the parameter |b| to
|continue_on_error|.

Change-Id: Id6830f2d4ed8ec569ec2091624d40fa687bad8fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3307620


Auto-Submit: Chris Blume <cblume@chromium.org>
Commit-Queue: François Degros <fdegros@chromium.org>
Reviewed-by: François Degros <fdegros@chromium.org>
Cr-Commit-Position: refs/heads/main@{#946733}
NOKEYCHECK=True
GitOrigin-RevId: 8c09262e21c60ad44d02b1e9ec2bd5b5c41db14a