Line 8 of google-signin.html is using the old iron-flex method and is throwing errors:
<link rel="import" href="../iron-flex-layout/classes/iron-flex-layout.html">
Should be:
<link rel="import" href="../iron-flex-layout/iron-flex-layout-classes.html">
or
<link rel="import" href="../iron-flex-layout/iron-flex-layout.html">
Line 8 of google-signin.html is using the old iron-flex method and is throwing errors:
<link rel="import" href="../iron-flex-layout/classes/iron-flex-layout.html">
Should be:
<link rel="import" href="../iron-flex-layout/iron-flex-layout-classes.html">
or<link rel="import" href="../iron-flex-layout/iron-flex-layout.html">