Reland MD Audio Player.

chrome/app/chromeos_strings.grdp

Index: chrome/app/chromeos_strings.grdp
diff --git a/chrome/app/chromeos_strings.grdp b/chrome/app/chromeos_strings.grdp
index 981180cf0a22431b370e207501810ad82e200fc2..dc60b6f9cf71411e5111654d641f57d9e6cfae84 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -1049,6 +1049,20 @@ Press any key to continue exploring.
     Volume slider
   </message>
 
+<!-- Audio Player -->
+  <message name="IDS_AUDIO_PLAYER_SHUFFLE_BUTTON_LABEL" desc="Label for the Shuffle button of audio player.">
+    Shuffle
+  </message>
+  <message name="IDS_AUDIO_PLAYER_REPEAT_BUTTON_LABEL" desc="Label for the Repeat button of audio player">
+    Repeat
+  </message>
+  <message name="IDS_AUDIO_PLAYER_OPEN_VOLUME_SLIDER_BUTTON_LABEL" desc="Label for a button which is used to open volume slider in audio player.">
+    Open volume slider
+  </message>
+  <message name="IDS_AUDIO_PLAYER_OPEN_PLAY_LIST_BUTTON_LABEL" desc="Label for a button which is used to open play list in audio player.">
+    Open play list
+  </message>
+
 <!-- Video Player -->
   <message name="IDS_VIDEO_PLAYER_PLAY_THIS_COMPUTER" desc="In the video player app, message of menu item which is shown at the top of the list of Chromecasts. This menuitem is to play the video on this computer (locally), intead of on TVs with Chromecast.">
     This computer