Mock up code completion.

dart/site/try/src/run.dart

 // 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.
 
 library trydart.run;
 
 import 'dart:html' show
     Blob,
     IFrameElement,
     Url;
@@ skipping 33 matching lines @@
 }
 
 window.onerror = function (message, url, lineNumber) {
   window.parent.postMessage(
       ["error", {message: message, url: url, lineNumber: lineNumber}], "*");
 };
 
 (function () {
 
 function postScrollHeight() {
-  window.parent.postMessage(["scrollHeight", document.documentElement.scrollHeight], "*");
+  window.parent.postMessage(
+      ["scrollHeight", document.documentElement.scrollHeight], "*");
 }
 
-var observer = new (window.MutationObserver||window.WebKitMutationObserver||window.MozMutationObserver)(function(mutations) {
+var observer = new (window.MutationObserver ||
+                    window.WebKitMutationObserver ||
+                    window.MozMutationObserver)(function(mutations) {
   postScrollHeight()
   window.setTimeout(postScrollHeight, 500);
 });
 
 observer.observe(
     document.body,
     { attributes: true,
       childList: true,
       characterData: true,
       subtree: true });
 })();
 ''';