Remove property "running" from proxy-pair

We don't need it, and already have a function webrtcIsReady that tells
us what we need to know (whether a datachannel was opened before the
timeout period).

proxy/proxypair.js

@@ -88,7 +88,6 @@ class ProxyPair {
       if (!this.active) {
         return;
       }
-      this.running = true;
       snowflake.ui.setActive(true);
       // This is the point when the WebRTC datachannel is done, so the next step
       // is to establish websocket to the server.
@@ -191,7 +190,6 @@ class ProxyPair {
     this.relay = null;
     this.onCleanup();
     this.active = false;
-    this.running = false;
   }
 
   flush() {
@@ -255,8 +253,6 @@ ProxyPair.prototype.relay = null; // websocket
 
 ProxyPair.prototype.timer = 0;
 
-ProxyPair.prototype.running = false; // Whether a datachannel is opened
-
 ProxyPair.prototype.active = false; // Whether serving a client.
 
 ProxyPair.prototype.flush_timeout_id = null;

proxy/snowflake.js

@@ -78,7 +78,7 @@ class Snowflake {
         }
         //set a timeout for channel creation
         return setTimeout((() => {
-          if (!pair.running) {
+          if (!pair.webrtcIsReady()) {
             log('proxypair datachannel timed out waiting for open');
             pair.close();
             return pair.active = false;