UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2664.1 Safari/537.36

Steps to reproduce the problem:
1. Visit any site, e.g. https://chromiumbugs.appspot.com
2. open JS console
3. enter performance.getEntriesByType('resource')[0]
4. observe object with ~20 keys, like connectStart, secureConnectionStart, etc (as shown in attachment)
5. enter JSON.stringify( performance.getEntriesByType('resource')[0] )
6. Observe JSON string with < 5 keys, e.g. '"{"name":"https://chromiumbugs.appspot.com/static/css/wizard.css","entryType":"resource","startTime":340.26500000000004,"duration":322.91}"'

What is the expected behavior?
All entries present a PerformanceResourceTiming object should exist after serialization, e.g. 

{
  "initiatorType": "link",
  "redirectStart": 0,
  "redirectEnd": 0,
  "fetchStart": 340.26500000000004,
  "domainLookupStart": 340.26500000000004,
  "domainLookupEnd": 340.26500000000004,
  "connectStart": 340.26500000000004,
  "connectEnd": 340.26500000000004,
  "secureConnectionStart": 0,
  "requestStart": 384.77000000000004,
  "responseStart": 644.1550000000001,
  "responseEnd": 663.1750000000001,
  "workerStart": 0,
  "name": "https://chromiumbugs.appspot.com/static/css/wizard.css",
  "entryType": "resource",
  "startTime": 340.26500000000004,
  "duration": 322.91
}

What went wrong?
Many keys are missing. e.g. 

{
  "name": "https://chromiumbugs.appspot.com/static/css/wizard.css",
  "entryType": "resource",
  "startTime": 340.26500000000004,
  "duration": 322.91
}

It appears to be serialized as a PerformanceEntry object, not a PerformanceResourceTiming object

Did this work before? N/A 

Chrome version: 51.0.2664.1  Channel: canary
OS Version: OS X 10.11.3
Flash Version: Shockwave Flash 21.0 r0

This applies to console's copy command as well
 

Deleted: Screen Shot 2016-03-04 at 4.58.26 PM.png 174 KB

	Screen Shot 2016-03-04 at 4.58.26 PM.png 174 KB View Download