dynamic only fix, url polyfill fix

Author: guybedford

src/dynamic-only.js

@@ -30,4 +30,6 @@
     console.assert(load.status == 'linked', 'is linked ' + load.name);
     return load.module.module;
   }
+
+  function doEnsureEvaluated() {}
 })();

src/loader.js

@@ -542,7 +542,7 @@ function logloads(loads) {
         exc = addToError(exc, 'Error loading "' + load.name + '" at ' + (load.address || '<unknown>'));
     }
     else {
-      exc = addToError(exc, 'Error linking "' + linkSet.loads[0].name + '" at ' + (linkSet.loads[0].address || '<unknwon>'));
+      exc = addToError(exc, 'Error linking "' + linkSet.loads[0].name + '" at ' + (linkSet.loads[0].address || '<unknown>'));
     }
 
 

src/url-polyfill.js

@@ -1,4 +1,6 @@
-  // from https://gist.github.com/Yaffle/1088850
+// from https://gist.github.com/Yaffle/1088850
+if (typeof URL === 'undefined')
+URL = (function() {
   function URL(url, baseURL) {
     if (typeof url != 'string')
       throw new TypeError('URL must be a string');
@@ -64,4 +66,6 @@
     this.pathname = pathname;
     this.search = search;
     this.hash = hash;
-  }
+  }
+  return URL;
+})();