RubyLB: Fix a crash by RTL + zero-available-width + break-spaces
LineBreaker should not produce an empty LineInfo for ruby-base.
Bug: 352467338
Change-Id: Ifaa9f300ef9fa22e7697896d8434506f50257dc4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5759423
Commit-Queue: Kent Tamura tkent@chromium.org
Reviewed-by: Koji Ishii kojii@chromium.org
Cr-Commit-Position: refs/heads/main@{#1337535}