Ignore \n metrics so it does not affect the layout

Bug: skia:11370
Change-Id: I17bf1304750be2c98f037bb8aebd65c525d836de
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/388445
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
2 files changed