Files app: Compile custom elements.

ui/file_manager/audio_player/elements/control_panel.js

Index: ui/file_manager/audio_player/elements/control_panel.js
diff --git a/ui/file_manager/audio_player/elements/control_panel.js b/ui/file_manager/audio_player/elements/control_panel.js
index ad142fd1736e95a245a778fb29f11f2612f577ce..8e6668bb6a689110f62555eaf13070b7d9743ea5 100644
--- a/ui/file_manager/audio_player/elements/control_panel.js
+++ b/ui/file_manager/audio_player/elements/control_panel.js
@@ -2,6 +2,24 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+/**
+ * @typedef {?{
+ *   mute: string,
+ *   next: string,
+ *   pause: string,
+ *   play: string,
+ *   playList: string,
+ *   previous: string,
+ *   repeat: string,
+ *   seekSlider: string,
+ *   shuffle: string,
+ *   unmute: string,
+ *   volume: string,
+ *   volumeSlider: string,
+ * }}
+ */
+var AriaLabels;
+
 (function() {
   'use strict';
 
@@ -279,6 +297,7 @@
         this.$.volumeSlider.value = volume;
 
       if (this.ariaLabels) {
+        this.ariaLabels = /** @type {!AriaLabels} */ (this.ariaLabels);
         this.$.volumeButton.setAttribute('aria-label',
             volume !== 0 ? this.ariaLabels.mute : this.ariaLabels.unmute);
       }
@@ -291,6 +310,7 @@
      */
     ariaLabelsChanged_: function(ariaLabels) {
       assert(ariaLabels);
+      ariaLabels = /** @type {!AriaLabels} */ (ariaLabels);
       // TODO(fukino): Use data bindings.
       this.$.volumeSlider.setAttribute('aria-label', ariaLabels.volumeSlider);
       this.$.shuffle.setAttribute('aria-label', ariaLabels.shuffle);