GitLab

Do not show the expand/collapse buttons when there is an error,
and set the error state to false if the caption bubble starts
receiving text.

Bug: 1055150
Change-Id: Id5e8a7b4fd93058643673a7707eda22f94baf5dc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2598619Reviewed-by: Josiah Krutz <josiahk@google.com>
Commit-Queue: Abigail Klein <abigailbklein@google.com>
Cr-Commit-Position: refs/heads/master@{#839779}