Audio Player: Close the player on Ctrl-W.

ui/file_manager/audio_player/js/audio_player.js

Index: ui/file_manager/audio_player/js/audio_player.js
diff --git a/ui/file_manager/audio_player/js/audio_player.js b/ui/file_manager/audio_player/js/audio_player.js
index f1a1a4a704e3c20adb97ba19f7f3db49d2229214..ffb0f7a60179e691a25a44499635bd42d0d14deb 100644
--- a/ui/file_manager/audio_player/js/audio_player.js
+++ b/ui/file_manager/audio_player/js/audio_player.js
@@ -327,6 +327,10 @@ AudioPlayer.prototype.onResize_ = function(event) {
  */
 AudioPlayer.prototype.onKeyDown_ = function(event) {
   switch (util.getKeyModifiers(event) + event.keyIdentifier) {
+    case 'Ctrl-U+0057': // Ctrl+W => Close the player.
+      chrome.app.window.current().close();
+      break;
+
     // Handle debug shortcut keys.
     case 'Ctrl-Shift-U+0049': // Ctrl+Shift+I
       chrome.fileManagerPrivate.openInspector('normal');