Merge pull request web-platform-tests#114 from w3c/jgraham/document_d…

…omain_dispatch

Don't error out trying to access cross-origin functions when document.domain got set; r=Ms2ger

testharness.js

@@ -71,13 +71,22 @@ policies and contribution forms [3].
 
     WindowTestEnvironment.prototype._dispatch = function(selector, callback_args, message_arg) {
         this._forEach_windows(
-                function(w, is_same_origin) {
-                    if (is_same_origin && selector in w) {
+                function(w, same_origin) {
+                    if (same_origin) {
                         try {
-                            w[selector].apply(undefined, callback_args);
-                        } catch (e) {
-                            if (debug) {
-                                throw e;
+                            var has_selector = selector in w;
+                        } catch(e) {
+                            // If document.domain was set at some point same_origin can be
+                            // wrong and the above will fail.
+                            has_selector = false;
+                        }
+                        if (has_selector) {
+                            try {
+                                w[selector].apply(undefined, callback_args);
+                            } catch (e) {
+                                if (debug) {
+                                    throw e;
+                                }
                             }
                         }
                     }