Update google analytics support (#343)
Update google analytics support (#343)

Migrate from legacy ga.js to analytics.js (for #309)
Per https://developers.google.com/analytics/devguides/collection/upgrade/reference/gajs-analyticsjs
jeffposnick/chromium-dashboard,GoogleChrome/chromium-dashboard,GoogleChrome/chromium-dashboard,GoogleChrome/chromium-dashboard,jeffposnick/chromium-dashboard,jeffposnick/chromium-dashboard,jeffposnick/chromium-dashboard,jeffposnick/chromium-dashboard,GoogleChrome/chromium-dashboard,GoogleChrome/chromium-dashboard