Merge remote-tracking branch 'origin/race_conditions' into api_eslint

conference.js

 
 const eventEmitter = new EventEmitter();
 
-let room, connection, localAudio, localVideo;
+let room, connection, localAudio, localVideo,
+    initialAudioMutedState = false, initialVideoMutedState = false;
 
 /**
  * Indicates whether extension external installation is in progress or not.
                 analytics.init();
                 return createInitialLocalTracksAndConnect(options.roomName);
             }).then(([tracks, con]) => {
+                tracks.forEach(track => {
+                    if((track.isAudioTrack() && initialAudioMutedState)
+                        || (track.isVideoTrack() && initialVideoMutedState)) {
+                        track.mute();
+                    }
+                });
                 logger.log('initialized with %s local tracks', tracks.length);
                 con.addEventListener(
                     ConnectionEvents.CONNECTION_FAILED,
         return this.audioMuted;
     },
     /**
-     * Simulates toolbar button click for audio mute. Used by shortcuts and API.
+     * Simulates toolbar button click for audio mute. Used by shortcuts
+     * and API.
+     * @param {boolean} force - If the track is not created, the operation
+     * will be executed after the track is created. Otherwise the operation
+     * will be ignored.
      */
-    toggleAudioMuted () {
+    toggleAudioMuted (force = false) {
+        if(!localAudio && force) {
+            initialAudioMutedState = !initialAudioMutedState;
+            return;
+        }
         this.muteAudio(!this.audioMuted);
     },
     /**
     },
     /**
      * Simulates toolbar button click for video mute. Used by shortcuts and API.
+     * @param {boolean} force - If the track is not created, the operation
+     * will be executed after the track is created. Otherwise the operation
+     * will be ignored.
      */
-    toggleVideoMuted () {
+    toggleVideoMuted (force = false) {
+        if(!localVideo && force) {
+            initialVideoMutedState = !initialVideoMutedState;
+            return;
+        }
         this.muteVideo(!this.videoMuted);
     },
     /**

modules/API/API.js

     commands = {
         'display-name':
             APP.conference.changeLocalDisplayName.bind(APP.conference),
-        'toggle-audio': APP.conference.toggleAudioMuted.bind(APP.conference),
-        'toggle-video': APP.conference.toggleVideoMuted.bind(APP.conference),
+        'toggle-audio': () => APP.conference.toggleAudioMuted(true),
+        'toggle-video': () => APP.conference.toggleVideoMuted(true),
         'toggle-film-strip': APP.UI.toggleFilmstrip,
         'toggle-chat': APP.UI.toggleChat,
         'toggle-contact-list': APP.UI.toggleContactList,