Devtools: make DOM traversal utilities climb shadow tree.

Source/devtools/front_end/ui/UIUtils.js

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.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:
  *
@@ skipping 167 matching lines @@
     var element = /** {!Element} */ (node);
     if (element.classList.contains("text-prompt") || element.nodeName === "INPUT" || element.nodeName === "TEXTAREA")
         return true;
 
     if (!WebInspector.__editingCount)
         return false;
 
     while (element) {
         if (element.__editing)
             return true;
-        element = element.parentElement;
+        element = element.parentElementOrShadowHost();
     }
     return false;
 }
 
 /**
  * @param {!Element} element
  * @param {boolean} value
  * @return {boolean}
  */
 WebInspector.markBeingEdited = function(element, value)
@@ skipping 879 matching lines @@
     window.addEventListener("focus", WebInspector._windowFocused, false);
     window.addEventListener("blur", WebInspector._windowBlurred, false);
     document.addEventListener("focus", WebInspector._focusChanged, true);
     document.addEventListener("blur", WebInspector._documentBlurred, true);
     window.removeEventListener("DOMContentLoaded", windowLoaded, false);
 }
 
 window.addEventListener("DOMContentLoaded", windowLoaded, false);
 
 })();