Initial work on ImageData.data.

tools/dom/templates/html/impl/impl_ImageData.darttemplate

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of $LIBRARYNAME;
+$ANNOTATIONS
+class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
+$if DARTIUM
+  List<int> __data;
 
-$(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
+  List<int> get data {
+    if (__data == null) {
+      __data = _data;
+    }
+    return __data;
+  }
+$endif
+
 $!MEMBERS
-  static SpeechRecognition _create() {
-    return JS('SpeechRecognition',
-        'new (window.SpeechRecognition || window.webkitSpeechRecognition)()');
-  }
 }