DevTools: Inspect element mode does not select element in ShadowDOM

Source/devtools/front_end/DOMBreakpointsSidebarPane.js

 /*
  * Copyright (C) 2011 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 135 matching lines @@
         }
         WebInspector.formatLocalized(message, substitutions, formatters, "", append);
 
         callback(element);
     },
 
     _nodeRemoved: function(event)
     {
         var node = event.data.node;
         this._removeBreakpointsForNode(event.data.node);
-        if (!node.children)
+        var children = node.children();
+        if (!children)
             return;
-        for (var i = 0; i < node.children.length; ++i)
-            this._removeBreakpointsForNode(node.children[i]);
+        for (var i = 0; i < children.length; ++i)
+            this._removeBreakpointsForNode(children[i]);
         this._saveBreakpoints();
     },
 
     _removeBreakpointsForNode: function(node)
     {
         for (var id in this._breakpointElements) {
             var element = this._breakpointElements[id];
             if (element._node === node)
                 this._removeBreakpoint(element._node, element._type);
         }
@@ skipping 223 matching lines @@
             this.element.appendChild(this.bodyElement);
     },
 
     __proto__: WebInspector.SidebarPane.prototype
 }
 
 /**
  * @type {?WebInspector.DOMBreakpointsSidebarPane}
  */
 WebInspector.domBreakpointsSidebarPane = null;