Add Chromium UI Contact Information

Change-Id: I29dc8309d545b4fbc7f51e21573b2582f6c82954
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2154924
Commit-Queue: Robert Liao <robliao@chromium.org>
Auto-Submit: Robert Liao <robliao@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#760242}

docs/ui/ask/index.md

-# Ask about Chromium UI
-
 # Contact Us
 
-Coming soon.
+Need to ask a question? You can contact us with one of the methods below.
+
+## Desktop
+
+|||---|||
+
+### **Chat**
+
+[Slack desktop-ui Chromium Channel](https://chromium.slack.com/archives/CGL100B7H)
+
+Ask short questions here.
+
+Requires a Slack account.
+
+### **Discuss**
+
+[Chromium UI Discussion](https://groups.google.com/a/chromium.org/forum/#!forum/ui)
+
+Browse, ask, and respond to technical and design discussions.
+
+Asking and responding require a Google account.
+
+### **E-mail**
+
+[ui@chromium.org](mailto:ui@chromium.org)
+
+Post to [Chromium UI Discussion](https://groups.google.com/a/chromium.org/forum/#!forum/ui)
+without a Google account.
+
+|||---|||
+
+---
+
+Google Internal Resources
+
+|||---|||
+
+#####
+
+[Desktop UI Channel](https://chat.google.com/room/AAAA0vhHCUE)
+
+#####
+
+[Desktop UI Discussion](https://groups.google.com/a/google.com/forum/#!forum/chrome-desktop-ui)
+
+#####
+
+[chrome-desktop-ui@google.com](mailto:chrome-desktop-ui@google.com)
+
+|||---|||

docs/ui/index.md

@@ -25,6 +25,8 @@ Processes
 
 Ways to get help.
 
-* [Coming Soon]
+* [Chat](/docs/ui/ask/index.md#chat)
+* [Discuss](docs/ui/ask/index.md#discuss)
+* [E-mail](/docs/ui/ask/index.md#e_mail)
 
 |||---|||