Quick View: avoid to lose focus when metadata button is clicked.

ui/file_manager/file_manager/foreground/elements/files_quick_view.js

Index: ui/file_manager/file_manager/foreground/elements/files_quick_view.js
diff --git a/ui/file_manager/file_manager/foreground/elements/files_quick_view.js b/ui/file_manager/file_manager/foreground/elements/files_quick_view.js
index 3fc8e6f922c1c42bfcb20de8f5b0ca6e65d67837..f887b5e3858ad252839e30f4901dc5dd95a99c42 100644
--- a/ui/file_manager/file_manager/foreground/elements/files_quick_view.js
+++ b/ui/file_manager/file_manager/foreground/elements/files_quick_view.js
@@ -79,6 +79,17 @@ var FilesQuickView = Polymer({
   onOpenInNewButtonTap: function(event) {},
 
   /**
+   * @param {!Event} event tap event.
+   *
+   * @private
+   */
+  onMetadataButtonTap_: function(event) {
+    // Set focus back to innerContent panel so that pressing space key next
+    // closes Quick View.
+    this.$.innerContentPanel.focus();
+  },
+
+  /**
    * Close Quick View unless the clicked target or its ancestor contains
    * 'no-close-on-click' class.
    *