Improve reconnect logic

Always test connectivity with an http request after a websocket closes,
regardless of what code/error it closed with. If that request succeeds,
automatically reconnect the socket.

// FREEBIE

js/libtextsecure.js

@@ -39398,14 +39398,12 @@ function generateKeys(count, progressCallback) {
             // initialize the socket and start listening for messages
             this.socket = TextSecureServer.getMessageWebsocket(url);
             this.socket.onclose = function(e) {
-                if (e.code === 1006) {
+                // possible 403. Make a request to confirm
-                    // possible 403. Make an request to confirm
                 TextSecureServer.getDevices(textsecure.storage.user.getNumber()).catch(function(e) {
                     var ev = new Event('textsecure:error');
                     ev.error = e;
                     eventTarget.dispatchEvent(ev);
-                    });
+                }).then(this.connect.bind(this)); // No HTTP error? Reconnect.
-                }
             };
 
             this.wsr = new WebSocketResource(this.socket, {

libtextsecure/message_receiver.js

@@ -22,14 +22,12 @@
             // initialize the socket and start listening for messages
             this.socket = TextSecureServer.getMessageWebsocket(url);
             this.socket.onclose = function(e) {
-                if (e.code === 1006) {
+                // possible 403. Make a request to confirm
-                    // possible 403. Make an request to confirm
                 TextSecureServer.getDevices(textsecure.storage.user.getNumber()).catch(function(e) {
                     var ev = new Event('textsecure:error');
                     ev.error = e;
                     eventTarget.dispatchEvent(ev);
-                    });
+                }).then(this.connect.bind(this)); // No HTTP error? Reconnect.
-                }
             };
 
             this.wsr = new WebSocketResource(this.socket, {