Nice. It looks like a subset of internal tool. Even my favorite shortcut is working (l r - reference to current line in current commit)
https://source.chromium.org/chromium/chromium/src/+/master:i...
https://source.chromium.org/chromium/chromium/src/+/master:i...
https://cs.chromium.org
also android's
https://cs.android.com/
So you can compare