add debug info

browser/fuel/test/browser_Browser.js

@@ -79,7 +79,9 @@ function test() {
 
     let browser = gBrowser.getBrowserAtIndex(gPageB.index);
     browser.addProgressListener({
-      onStateChange: function(webProgress, request, stateFlags, status) {
+      onStateChange: function (webProgress, request, stateFlags, status) {
+        info("onStateChange: " + stateFlags);
+
         const complete = Ci.nsIWebProgressListener.STATE_IS_WINDOW +
                          Ci.nsIWebProgressListener.STATE_IS_NETWORK +
                          Ci.nsIWebProgressListener.STATE_STOP;
@@ -89,18 +91,13 @@ function test() {
         }
       },
 
-      onLocationChange: function() { return 0; },
-      onProgressChange: function() { return 0; },
-      onStatusChange: function() { return 0; },
-      onSecurityChange: function() { return 0; },
-      QueryInterface: function(iid) {
-        if (iid.equals(Ci.nsISupportsWeakReference) ||
-           iid.equals(Ci.nsIWebProgressListener) ||
-           iid.equals(Ci.nsISupports))
-           return this;
-
-        throw Components.results.NS_ERROR_NO_INTERFACE;
-      }
+      onLocationChange: function () 0,
+      onProgressChange: function () 0,
+      onStatusChange: function () 0,
+      onSecurityChange: function () 0,
+      QueryInterface: XPCOMUtils.generateQI([Ci.nsISupportsWeakReference,
+                                             Ci.nsIWebProgressListener,
+                                             Ci.nsISupports])
     });
 
     // test loading new content with a frame into a tab
@@ -111,6 +108,7 @@ function test() {
 
   function onPageBLoadWithFrames(event) {
     gPageLoadCount++;
+    info("onPageBLoadWithFrames: " + gPageLoadCount);
   }
 
   function onPageBLoadComplete() {