[DevTools] Show distribution for Shadow DOM V1.

third_party/WebKit/Source/devtools/front_end/sdk/DOMModel.js

 /*
  * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * 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.
@@ skipping 257 matching lines @@
         if (!this._pseudoElements)
             return null;
         return this._pseudoElements.get(WebInspector.DOMNode.PseudoElementNames.After);
     },
 
     /**
      * @return {boolean}
      */
     isInsertionPoint: function()
     {
-        return !this.isXMLNode() && (this._nodeName === "SHADOW" || this._nodeName === "CONTENT");
+        return !this.isXMLNode() && (this._nodeName === "SHADOW" || this._nodeName === "CONTENT" || this._nodeName === "SLOT");
     },
 
     /**
      * @return {!Array.<!WebInspector.DOMNodeShortcut>}
      */
     distributedNodes: function()
     {
         return this._distributedNodes || [];
     },
 
@@ skipping 1991 matching lines @@
 }
 
 /**
  * @param {!WebInspector.Target} target
  * @return {?WebInspector.DOMModel}
  */
 WebInspector.DOMModel.fromTarget = function(target)
 {
     return /** @type {?WebInspector.DOMModel} */ (target.model(WebInspector.DOMModel));
 }