Experiment: always use doubles for setLength

Should allow more stroke cases to succeed, and simplifies the impl.

Bug: oss-fuzz:6811
Change-Id: I53390f57372938ba6d732726486a567c26ff121f
Reviewed-on: https://skia-review.googlesource.com/c/131140
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
4 files changed