Restore vanilla components

app/javascript/mastodon/components/avatar_overlay.js

@@ -0,0 +1,30 @@
+import React from 'react';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+
+export default class AvatarOverlay extends React.PureComponent {
+
+  static propTypes = {
+    account: ImmutablePropTypes.map.isRequired,
+    friend: ImmutablePropTypes.map.isRequired,
+  };
+
+  render() {
+    const { account, friend } = this.props;
+
+    const baseStyle = {
+      backgroundImage: `url(${account.get('avatar_static')})`,
+    };
+
+    const overlayStyle = {
+      backgroundImage: `url(${friend.get('avatar_static')})`,
+    };
+
+    return (
+      <div className='account__avatar-overlay'>
+        <div className='account__avatar-overlay-base' style={baseStyle} />
+        <div className='account__avatar-overlay-overlay' style={overlayStyle} />
+      </div>
+    );
+  }
+
+}