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

client/html/generated/html/dartium/FileEntrySync.dart

+
+class _FileEntrySyncImpl extends _EntrySyncImpl implements FileEntrySync {
+  _FileEntrySyncImpl._wrap(ptr) : super._wrap(ptr);
+
+  FileWriterSync createWriter() {
+    return _wrap(_ptr.createWriter());
+  }
+
+  File file() {
+    return _wrap(_ptr.file());
+  }
+}