A playlist loader setBandwidthByXhr. Fix a test.

@@ -58,7 +58,7 @@
         haveMetadata = function(error, xhr, url) {
           var parser, refreshDelay, update;
 
-          loader.bandwidth = request && request.bandwidth || xhr && xhr.bandwidth;
+          loader.setBandwidthByXHR(request || xhr);
 
           // any in-flight request is now finished
           request = null;
@@ -202,6 +202,10 @@
         });
       };
 
+      loader.setBandwidthByXHR = function(xhr) {
+        loader.bandwidth = xhr.bandwidth;
+      };
+
       // live playlist staleness timeout
       loader.on('mediaupdatetimeout', function() {
         if (loader.state !== 'HAVE_METADATA') {

@@ -377,8 +377,10 @@ test('downloads a second media playlist before playback, if bandwidth is high',
 
   standardXHRResponse(requests[0]);
 
-  player.hls.bandwidth = 0;
-  requests[1].requestTime = (new Date()) - 100;
+  player.hls.playlists.setBandwidthByXHR = function() {
+    player.hls.playlists.bandwidth = 100000;
+  };
+
   standardXHRResponse(requests[1]);
   standardXHRResponse(requests[2]);
   standardXHRResponse(requests[3]);