DevTools: Code fixes for the Closure compiler roll

Source/devtools/front_end/profiler/heap_snapshot_worker/JSHeapSnapshot.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 138 matching lines @@
     },
 
     /**
      * @param {function(!WebInspector.HeapSnapshotNode)} action
      * @param {boolean=} userRootsOnly
      */
     forEachRoot: function(action, userRootsOnly)
     {
         /**
          * @param {!WebInspector.HeapSnapshotNode} node
-         * @param {!string} name
+         * @param {string} name
          * @return {?WebInspector.HeapSnapshotNode}
          */
         function getChildNodeByName(node, name)
         {
             for (var iter = node.edges(); iter.hasNext(); iter.next()) {
                 var child = iter.edge.node();
                 if (child.name() === name)
                     return child;
             }
             return null;
@@ skipping 645 matching lines @@
      * @return {boolean}
      */
     isWeak: function()
     {
         return this._edge().isWeak();
     },
 
     __proto__: WebInspector.HeapSnapshotRetainerEdge.prototype
 }