Add codereview settings

codereview.settings

diff --git a/codereview.settings b/codereview.settings
new file mode 100644
index 0000000..ef0e451
--- /dev/null
+++ b/codereview.settings
@@ -0,0 +1,4 @@
+# This file is used by gcl to get repository specific information.
+CODE_REVIEW_SERVER: codereview.chromium.org
+CC_LIST: mojo-reviews@chromium.org
+VIEW_VC: https://github.com/domokit/tonic/commit/