EME: Fix the CDM File IO test when run using unprefixed EME.

media/test/data/eme_player_js/player_utils.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.
 
 // The PlayerUtils provides utility functions to binding common media events
 // to specific player functions. It also provides functions to load media source
 // base on test configurations.
 var PlayerUtils = new function() {
 }
 
@@ skipping 80 matching lines @@
       }
     } catch (e) {
       Utils.failTest(e);
     }
   });
 
   this.registerDefaultEventListeners(player);
   player.video.receivedKeyMessage = false;
   Utils.timeLog('Setting video media keys: ' + player.testConfig.keySystem);
   var config = {};
+  // The File IO test requires persistent state support.
+  if (player.testConfig.keySystem ==
+      'org.chromium.externalclearkey.fileiotest') {
+    config = {persistentState: "required"};
+  }
   if (player.testConfig.sessionToLoad) {
     config = {
         persistentState: "required",
         sessionTypes: ["temporary", "persistent-license"]
     };
   }
   return navigator.requestMediaKeySystemAccess(
       player.testConfig.keySystem, [config])
       .then(function(access) { return access.createMediaKeys(); })
       .then(function(mediaKeys) {
@@ skipping 105 matching lines @@
       default:
         Utils.timeLog(keySystem + ' is not a known key system');
         if (usePrefixedEME)
           return PrefixedClearKeyPlayer;
         return ClearKeyPlayer;
     }
   }
   var Player = getPlayerType(testConfig.keySystem);
   return new Player(video, testConfig);
 };