Blocks: Explicitly select embed block on focus

Previously would work just as well, but unintentionally passes argument of type Event to setIsSelected via pass-through of onFocus handler

blocks/library/embed/index.js

@@ -71,7 +71,10 @@ function getEmbedBlockSettings( { title, icon, category = 'embed', transforms, k
 		edit: class extends Component {
 			constructor() {
 				super( ...arguments );
+
 				this.doServerSideRender = this.doServerSideRender.bind( this );
+				this.setIsSelected = this.setIsSelected.bind( this );
+
 				this.state = {
 					html: '',
 					type: '',
@@ -96,6 +99,10 @@ function getEmbedBlockSettings( { title, icon, category = 'embed', transforms, k
 				this.unmounting = true;
 			}
 
+			setIsSelected() {
+				this.props.setIsSelected( true );
+			}
+
 			getPhotoHtml( photo ) {
 				// 100% width for the preview so it fits nicely into the document, some "thumbnails" are
 				// acually the full size photo.
@@ -143,7 +150,7 @@ function getEmbedBlockSettings( { title, icon, category = 'embed', transforms, k
 			render() {
 				const { html, type, error, fetching } = this.state;
 				const { align, url, caption } = this.props.attributes;
-				const { setAttributes, isSelected, className, setIsSelected } = this.props;
+				const { setAttributes, isSelected, className } = this.props;
 				const updateAlignment = ( nextAlign ) => setAttributes( { align: nextAlign } );
 
 				const controls = isSelected && (
@@ -204,7 +211,7 @@ function getEmbedBlockSettings( { title, icon, category = 'embed', transforms, k
 							html={ html }
 							title={ iframeTitle }
 							type={ type }
-							onFocus={ setIsSelected }
+							onFocus={ this.setIsSelected }
 						/>
 					</div>
 				);