GitLab

1. Fix some typos.
2. Some links are out-of-date.

Bug: 775198
Change-Id: I11d56530427d61c727ece0c8632d40b7e8faca9f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2163627
Auto-Submit: Lijin Shen <lazzzis@google.com>
Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Theresa  <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#762072}