GitLab

This CL tweaks the a11y of detected QR code text by announcing the text
content and auto focus to the expand/copy button.

Bug: b/172879638
Test: Manually with Chromevox.

Change-Id: If9d219e7e397f219566e1790c17c6dfc5ad35ff6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2600428
Auto-Submit: Shik Chen <shik@chromium.org>
Reviewed-by: Wei Lee <wtlee@chromium.org>
Commit-Queue: Shik Chen <shik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#839319}