Changes in webui for SDK 0.7.0. Two general changes were needed:
 - changes to comply with the safe html changes. Now that Nodes can be created safely, I also allow injecting them in bindings directly.
 - changes in tests that relied on the order of iteration of sets (this seemed to have changed too)

R=blois@google.com

Review URL: https://chromiumcodereview.appspot.com//23532024