GitLab

StringAttribute::kClassName was unused. The only way the class name was
exposed was via the HTML attributes.

Expose via kClassName and remove from HTML attributes list.

Bug: None
Change-Id: I9667bd57460271a7310f26f8fee19fe41c234f05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2105953
Auto-Submit: Aaron Leventhal <aleventhal@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Kevin Babbitt <kbabbitt@microsoft.com>
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751370}