GitLab

Follow-up of
https://chromium-review.googlesource.com/c/chromium/src/+/2220359. This
CL removes related XXXToString() methods.

Bug: None
Change-Id: I99fb653e0f5ed179bb21fa8e48b5c79aa98b6557
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2425386Reviewed-by: Sergey Volk <servolk@chromium.org>
Commit-Queue: Linkun Chen <lkchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809707}