[Files.app] Initial implementation of new 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 55b38b47ccad95aa94e7c578531bac3c30adc842..31ac8b66be407392b607120dbba62510d470a550 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -112,6 +112,12 @@ Press any key to continue exploring.
   <message name="IDS_FLAGS_FILE_MANAGER_SHOW_CHECKBOXES_DESCRIPTION" desc="Description of the about:flag option to show the selecting checkboxes to the Files app.">
     Show selecting checkboxes in the Files.app.
   </message>
+  <message name="IDS_FLAGS_FILE_MANAGER_ENABLE_NEW_AUDIO_PLAYER_NAME" desc="Name of the about:flag option to enable the new audio player app.">
+    Enable the new audio player
+  </message>
+  <message name="IDS_FLAGS_FILE_MANAGER_ENABLE_NEW_AUDIO_PLAYER_DESCRIPTION" desc="Description of the about:flag option to the enable new audio player app.">
+    Use the experimental new audio player instead of the stable one.
+  </message>
   <message name="IDS_FLAGS_FILE_MANAGER_ENABLE_WEBSTORE_INTEGRATION" desc="Name of the about:flag option to enable the webstore integration feature in Files app.">
     Enable the integration of Webstore and Files.app.
   </message>