Add Chrome receiver app IDs to the feedback whitelist.

BUG=473845

Review URL: https://codereview.chromium.org/1048033004

Cr-Commit-Position: refs/heads/master@{#323969}

chrome/browser/resources/feedback/js/event_handler.js

@@ -61,6 +61,8 @@ var whitelistedExtensionIds = [
   '4F4A25F31413D9B9F80E61D096DEB09082515267', // http://crbug.com/470411
   'FBA0DE4D3EFB5485FC03760F01F821466907A743', // http://crbug.com/470411
   'E216473E4D15C5FB14522D32C5F8DEAAB2CECDC6', // http://crbug.com/470411
+  '676A08383D875E51CE4C2308D875AE77199F1413', // http://crbug.com/473845
+  '869A23E11B308AF45A68CC386C36AADA4BE44A01', // http://crbug.com/473845
 ];