Add dummy dart:html library for documentation.

lib/html/doc/interface/ScriptElement.dart

Index: lib/html/doc/interface/ScriptElement.dart
diff --git a/lib/html/doc/interface/ScriptElement.dart b/lib/html/doc/interface/ScriptElement.dart
new file mode 100644
index 0000000000000000000000000000000000000000..aec796e17807295b27bfbcde7251ea413f3e9ec3
--- /dev/null
+++ b/lib/html/doc/interface/ScriptElement.dart
@@ -0,0 +1,35 @@
+// Copyright (c) 2012, 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.
+
+// WARNING: Do not edit - generated code.
+
+/// @domName HTMLScriptElement
+interface ScriptElement extends Element default _Elements {
+
+  ScriptElement();
+
+  /** @domName HTMLScriptElement.async */
+  bool async;
+
+  /** @domName HTMLScriptElement.charset */
+  String charset;
+
+  /** @domName HTMLScriptElement.crossOrigin */
+  String crossOrigin;
+
+  /** @domName HTMLScriptElement.defer */
+  bool defer;
+
+  /** @domName HTMLScriptElement.event */
+  String event;
+
+  /** @domName HTMLScriptElement.htmlFor */
+  String htmlFor;
+
+  /** @domName HTMLScriptElement.src */
+  String src;
+
+  /** @domName HTMLScriptElement.type */
+  String type;
+}