GitLab

Currently note is added to highlights as:
Highlight
++ Note

While the correct format is:
Highlight
++ Note
++++ Note text

The CL fixes the structure for addition of notes in PDF highlights for
accessibility. Tests have been updated to reflect the new structure.

CQ_INCLUDE_TRYBOTS=luci.chromium.try:mac_chromium_dbg_ng

Bug: 1008775
Change-Id: I83e1f4e09c901b4c2d5969528e1aeef7aebc6196
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2315373
Commit-Queue: Ankit Kumar 🌪️ <ankk@microsoft.com>
Reviewed-by: Kevin Babbitt <kbabbitt@microsoft.com>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#792554}