Add Google Slides embed support

app/embeds/GoogleSlides.js

@@ -0,0 +1,23 @@
+// @flow
+import * as React from 'react';
+import Frame from './components/Frame';
+
+const URL_REGEX = new RegExp('^https?://docs.google.com/presentation/d/(.*)$');
+
+type Props = {
+  url: string,
+};
+
+export default class GoogleSlides extends React.Component<Props> {
+  static ENABLED = [URL_REGEX];
+
+  render() {
+    return (
+      <Frame
+        src={this.props.url.replace('/pub', '/embed')}
+        title="Google Slides Embed"
+        border
+      />
+    );
+  }
+}