GitLab

go/clank-webview points at a new site now, and some of the
subdirectories have changed. This updates chromium links to
go/clank-webview for the new paths.

Test: verify each link points to the correct page.
Change-Id: Ieed6dd527dca87e51c98b6182c68c843cb82486d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2307534
Auto-Submit: Nate Fischer <ntfschr@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790488}