Generate dart:html bindings for Dartium as well as Frog. All unittests now pass (or are disabled fo…

client/tests/client/dom/NativeGCTest.dart

 #library('NativeGCTest');
-#import('../../../testing/unittest/unittest.dart');
+#import('../../../testing/unittest/unittest_dom.dart');
 #import('dart:dom');
 
 main() {
 
   test('EventListener', () {
       final int N = 1000000;
       final int M = 1000;
 
       var div;
       for (int i = 0; i < M; ++i) {
@@ skipping 10 matching lines @@
             // Note: the reference to l keeps the entire list alive.
             Expect.equals(M - 1, l[N - 1]);
           }, false);
       }
 
       final event = document.createEvent('Event');
       event.initEvent('test', true, false);
       div.dispatchEvent(event);
   });
 }