Update Chrome section to include Skia roll/sheriff/bug info

site/dev/chrome/index.md

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 Skia in Chrome
 ==============
 
+Changes to the Skia repository will be rolled into Chromium (and Blink) by the
+AutoRoll bot several times per day.
+
 If you have a Skia change that needs to be tested in Chrome or Blink, or which
-requires associated changes in those repositories, this is the place for you.
+requires associated changes in those repositories, see the guides in this
+section for tips on execution.
+
+For problems in Chromium related to Skia rolls:
+
+  * Go to https://autoroll.skia.org. Login with google.com account and click
+    the STOP button to pause new rolls.
+  * Revert the offending DEPS roll.
+  * If an obvious owner cannot be found in the list of CLs, assign to the Skia
+    Sheriff, listed at the top of https://status.skia.org and as a reviewer
+    on the roll CL.
+  * If the Sheriff cannot be assigned, cc them and assign the issue to hcm@. 
+
+For more tips on bug triage and labeling, see the [Issue Tracker page](../../user/issue-tracker/).