Revert of Update json_schema_compiler to handle the Automation extension API

chrome/browser/resources/chromeos/chromevox/cvox2/background/media_automation_handler.js

 // Copyright 2016 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.
 
 /**
  * @fileoverview Handles media automation events.  Note that to perform any of
  * the actions below such as ducking, and suspension of media sessions, the
  * --enable-default-media-session flag must be passed at the command line.
  */
 
@@ skipping 18 matching lines @@
   this.mediaRoots_ = new Set();
 
   /** @type {Date} @private */
   this.lastTtsEvent_ = new Date();
 
   cvox.ChromeVox.tts.addCapturingEventListener(this);
 
   chrome.automation.getDesktop(function(node) {
     BaseAutomationHandler.call(this, node);
 
-    this.addListener_(EventType.MEDIA_STARTED_PLAYING,
-                      this.onMediaStartedPlaying);
-    this.addListener_(EventType.MEDIA_STOPPED_PLAYING,
-                      this.onMediaStoppedPlaying);
+    var e = EventType;
+    this.addListener_(e.mediaStartedPlaying, this.onMediaStartedPlaying);
+    this.addListener_(e.mediaStoppedPlaying, this.onMediaStoppedPlaying);
   }.bind(this));
 };
 
 /** @type {number} */
 MediaAutomationHandler.MIN_WAITTIME_MS = 1000;
 
 MediaAutomationHandler.prototype = {
   __proto__: BaseAutomationHandler.prototype,
 
   /** @override */
@@ skipping 59 matching lines @@
           root.resumeMedia();
       }
       item = it.next();
     }
   }
 };
 
 });  // goog.scope
 
 new MediaAutomationHandler();