Hide more of leftToRight checks

Moving some code down from paragraph to line.

Change-Id: I9408951fe8d05a5956e4bbe4b50c9ef3f3dc1f9c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/285838
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
6 files changed