Add codereview.settings for this branch.

R=kjellander@webrtc.org
NOTRY=true
NOPRESUBMIT=true

Review URL: https://codereview.webrtc.org/1327813002 .
diff --git a/codereview.settings b/codereview.settings
new file mode 100644
index 0000000..3dcd1b1
--- /dev/null
+++ b/codereview.settings
@@ -0,0 +1,5 @@
+# This file is used by gcl to get repository specific information.
+CODE_REVIEW_SERVER: codereview.webrtc.org
+CC_LIST: webrtc-reviews@webrtc.org
+VIEW_VC: https://chromium.googlesource.com/external/webrtc/+/
+PROJECT: webrtc