Revert "Patched in Dartium JsInterop"

tools/dom/src/_chrome/utils.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.
 
 /**
  * A set of utilities for use with the Chrome Extension APIs.
  *
  * Allows for easy access to required JS objects.
  */
 part of chrome;
@@ skipping 99 matching lines @@
   /*
    * Private (JS) constructor
    */
   Rule._proxy(_jsObject) : super._proxy(_jsObject);
 
   /*
    * Public accessors
    */
   String get id => JS('String', '#.id', this._jsObject);
 
-  set id(String id) {
+  void set id(String id) {
     JS('void', '#.id = #', this._jsObject, id);
   }
 
   // TODO(sashab): Wrap these generic Lists somehow.
   List get conditions => JS('List', '#.conditions', this._jsObject);
 
-  set conditions(List conditions) {
+  void set conditions(List conditions) {
     JS('void', '#.conditions = #', this._jsObject, convertArgument(conditions));
   }
 
   // TODO(sashab): Wrap these generic Lists somehow.
   List get actions => JS('List', '#.actions', this._jsObject);
 
-  set actions(List actions) {
+  void set actions(List actions) {
     JS('void', '#.actions = #', this._jsObject, convertArgument(actions));
   }
 
   int get priority => JS('int', '#.priority', this._jsObject);
 
-  set priority(int priority) {
+  void set priority(int priority) {
     JS('void', '#.priority = #', this._jsObject, priority);
   }
 
 }
 
 /**
  * The Event class.
  *
  * Chrome Event classes extend this interface.
  *
@@ skipping 135 matching lines @@
                                       void callback()]) =>
       JS('void',
          '#.removeRules(#, #, #)',
          this._jsObject,
          convertArgument(eventName),
          convertArgument(ruleIdentifiers),
          convertDartClosureToJS(callback, 0)
       );
 }