Add pointer to Eng Review office hours

Change-Id: I9fea69d02430a3045b0a1840fc3b728b7935461f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3489912
Auto-Submit: Alex Mineer <[email protected]>
Reviewed-by: John Abd-El-Malek <[email protected]>
Commit-Queue: John Abd-El-Malek <[email protected]>
Cr-Commit-Position: refs/heads/main@{#975170}
diff --git a/docs/adding_to_third_party.md b/docs/adding_to_third_party.md
index 70a161e..6cc429f7 100644
--- a/docs/adding_to_third_party.md
+++ b/docs/adding_to_third_party.md
@@ -21,10 +21,14 @@
 ## Before you start
 
 To make sure the inclusion of a new third_party project makes sense for the
-Chromium project, you should first obtain Chrome Eng Review approval.
-Googlers should see go/chrome-eng-review and review existing topics in
-g/chrome-eng-review. Please include information about the additional checkout
-size, build times, and binary size increase of
+Chromium project, you should first obtain
+[Chrome Eng Review](../ENG_REVIEW_OWNERS) approval. Googlers should see
+[go/chrome-eng-review](https://goto.google.com/chrome-eng-review) and review
+existing topics in g/chrome-eng-review, and can also come to office hours to ask
+questions.
+
+Please include information about the additional checkout size, build times,
+and binary size increase of
 [official](https://www.chromium.org/developers/gn-build-configuration) builds
 on Android and one desktop platform. Please also make sure that the motivation
 for your project is clear, e.g., a design doc has been circulated.