feat(chromium): roll Chromium to r669486 (#4591)

This roll includes:
- https://crrev.com/c/1589672/ - Include retired instruction delta in TraceEvents

package.json

@@ -8,7 +8,7 @@
     "node": ">=6.4.0"
   },
   "puppeteer": {
-    "chromium_revision": "668716"
+    "chromium_revision": "669486"
   },
   "scripts": {
     "unit": "node test/test.js",