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

client/html/generated/html/frog/FileWriter.dart

+
+class _FileWriterImpl implements FileWriter native "*FileWriter" {
+
+  static final int DONE = 2;
+
+  static final int INIT = 0;
+
+  static final int WRITING = 1;
+
+  final _FileErrorImpl error;
+
+  final int length;
+
+  EventListener onabort;
+
+  EventListener onerror;
+
+  EventListener onprogress;
+
+  EventListener onwrite;
+
+  EventListener onwriteend;
+
+  EventListener onwritestart;
+
+  final int position;
+
+  final int readyState;
+
+  void abort() native;
+
+  void seek(int position) native;
+
+  void truncate(int size) native;
+
+  void write(_BlobImpl data) native;
+}