AudioPlayer: Update layout to show the volume slider without using popup.

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 e178163b812f6859225766681ab0d89e49e4d8fb..f07bb0d4e6d14c5cb445f2e7bd37aac16cf883c1 100644
--- a/ui/file_manager/audio_player/js/audio_player.js
+++ b/ui/file_manager/audio_player/js/audio_player.js
@@ -66,16 +66,17 @@ function AudioPlayer(container) {
           strings['AUDIO_PLAYER_DEFAULT_ARTIST'];
       // Pass translated labels to the AudioPlayerElement.
       this.player_.ariaLabels = {
-        volumeSlider: strings['AUDIO_PLAYER_OPEN_VOLUME_SLIDER_BUTTON_LABEL'],
         shuffle: strings['AUDIO_PLAYER_SHUFFLE_BUTTON_LABEL'],
         repeat: strings['AUDIO_PLAYER_REPEAT_BUTTON_LABEL'],
         previous: strings['MEDIA_PLAYER_PREVIOUS_BUTTON_LABEL'],
         play: strings['MEDIA_PLAYER_PLAY_BUTTON_LABEL'],
         pause: strings['MEDIA_PLAYER_PAUSE_BUTTON_LABEL'],
         next: strings['MEDIA_PLAYER_NEXT_BUTTON_LABEL'],
-        volume: strings['AUDIO_PLAYER_OPEN_VOLUME_SLIDER_BUTTON_LABEL'],
         playList: strings['AUDIO_PLAYER_OPEN_PLAY_LIST_BUTTON_LABEL'],
-        seekSlider: strings['MEDIA_PLAYER_SEEK_SLIDER_LABEL']
+        seekSlider: strings['MEDIA_PLAYER_SEEK_SLIDER_LABEL'],
+        mute: strings['MEDIA_PLAYER_MUTE_BUTTON_LABEL'],
+        unmute: strings['MEDIA_PLAYER_UNMUTE_BUTTON_LABEL'],
+        volumeSlider: strings['MEDIA_PLAYER_VOLUME_SLIDER_LABEL']
       };
     }.bind(this));