Implement the Custom Elements :unresolved pseudoclass

Source/core/css/SelectorChecker.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 14 matching lines @@
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/css/SelectorChecker.h"
 
 #include "HTMLNames.h"
 #include "core/css/CSSSelector.h"
 #include "core/css/CSSSelectorList.h"
 #include "core/css/SiblingTraversalStrategies.h"
+#include "core/dom/CustomElementRegistry.h"
 #include "core/dom/Document.h"
 #include "core/dom/NodeRenderStyle.h"
 #include "core/dom/ShadowRoot.h"
 #include "core/dom/StyledElement.h"
 #include "core/dom/Text.h"
 #include "core/editing/FrameSelection.h"
 #include "core/html/HTMLDocument.h"
 #include "core/html/HTMLFrameElementBase.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLOptionElement.h"
@@ skipping 663 matching lines @@
             return (element->isWebVTTElement() && toWebVTTElement(element)->isPastNode());
 
         case CSSSelector::PseudoScope:
             {
                 const Node* contextualReferenceNode = !context.scope || (context.behaviorAtBoundary & BoundaryBehaviorMask) == CrossesBoundary ? element->document()->documentElement() : context.scope;
                 if (element == contextualReferenceNode)
                     return true;
                 break;
             }
 
+        case CSSSelector::PseudoUnresolved:
+            if (element->isUnresolvedCustomElement())
+                return true;
+            break;
+
         case CSSSelector::PseudoHorizontal:
         case CSSSelector::PseudoVertical:
         case CSSSelector::PseudoDecrement:
         case CSSSelector::PseudoIncrement:
         case CSSSelector::PseudoStart:
         case CSSSelector::PseudoEnd:
         case CSSSelector::PseudoDoubleButton:
         case CSSSelector::PseudoSingleButton:
         case CSSSelector::PseudoNoButton:
         case CSSSelector::PseudoCornerPresent:
@@ skipping 161 matching lines @@
     return element->focused() && isFrameFocused(element);
 }
 
 template
 SelectorChecker::Match SelectorChecker::match(const SelectorCheckingContext&, PseudoId&, const DOMSiblingTraversalStrategy&) const;
 
 template
 SelectorChecker::Match SelectorChecker::match(const SelectorCheckingContext&, PseudoId&, const ShadowDOMSiblingTraversalStrategy&) const;
 
 }