DevTools: [Elements] Do not copy nodes if there is a non-collapsed selection

Source/devtools/front_end/elements/ElementsTreeOutline.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 167 matching lines @@
     },
 
     /**
      * @param {boolean} isCut
      * @param {!Event} event
      */
     handleCopyOrCutKeyboardEvent: function(isCut, event)
     {
         this._setClipboardData(null);
 
+        // Don't prevent the normal copy if the user has a selection.
+        if (!window.getSelection().isCollapsed)
+            return;
+
         // Do not interfere with text editing.
         var currentFocusElement = WebInspector.currentFocusElement();
         if (currentFocusElement && WebInspector.isBeingEdited(currentFocusElement))
             return;
 
         var targetNode = this.selectedDOMNode();
         if (!targetNode)
             return;
 
         event.clipboardData.clearData();
@@ skipping 2631 matching lines @@
         var treeOutline = new WebInspector.ElementsTreeOutline(node.target(), false, false);
         treeOutline.rootDOMNode = node;
         treeOutline.element.classList.add("outline-disclosure");
         if (!treeOutline.children[0].hasChildren)
             treeOutline.element.classList.add("single-node");
         treeOutline.setVisible(true);
         treeOutline.element.treeElementForTest = treeOutline.children[0];
         return treeOutline.element;
     }
 }