Separate the audio player app from Files.app

chrome/test/data/extensions/api_test/file_manager_browsertest/file_manager/background.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 'use strict';
 
 /**
  * Extension ID of Files.app.
  * @type {string}
  * @const
  */
 var FILE_MANAGER_EXTENSIONS_ID = 'hhaomjibdihmijegdhdafkllkbggdgoj';
 
 var remoteCall = new RemoteCallFilesApp(FILE_MANAGER_EXTENSIONS_ID);
 
 /**
+ * Extension ID of Audio Player.
+ * @type {string}
+ * @const
+ */
+var AUDIO_PLAYER_APP_ID = 'cjbfomnbifhcdnihkgipgfcihmgjfhbf';
+
+var audioPlayerApp = new RemoteCall(AUDIO_PLAYER_APP_ID);
+
+/**
  * Wrapper function.
  * TODO(yoshiki): remove this. We should use methods in |remoteCall| directly.
  *
  * @param {string} func Function name.
  * @param {?string} appId Target window's App ID or null for functions
  *     not requiring a window.
  * @param {Array.<*>} args Array of arguments.
  * @param {function(*)=} opt_callback Callback handling the function's result.
  * @return {Promise} Promise to be fulfilled with the result of the remote
  *     utility.
@@ skipping 425 matching lines @@
         chrome.test.fail(testCaseName + ' is not found.');
         return;
       }
       // Specify the name of test to the test system.
       targetTest.generatedName = testCaseName;
       chrome.test.runTests([targetTest]);
     }
   ];
   steps.shift()();
 });