Fix "layout test" in comments in blink/{public,renderer}.

TBR=kinuko@chromium.org

Bug: 843412
Change-Id: I36cd63ab1c3b0b0541d458fa91d3b8c8759356f6
Reviewed-on: https://chromium-review.googlesource.com/c/1373049
Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615796}
64 files changed