Implement proposed shadow tree cascade order.

Source/core/css/resolver/MatchResult.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 32 matching lines @@
 {
 }
 
 DEFINE_TRACE(MatchedProperties)
 {
     visitor->trace(properties);
 }
 
 void MatchResult::addMatchedProperties(const StylePropertySet* properties, unsigned linkMatchType, PropertyWhitelistType propertyWhitelistType)
 {
-    matchedProperties.grow(matchedProperties.size() + 1);
-    MatchedProperties& newProperties = matchedProperties.last();
+    m_matchedProperties.grow(m_matchedProperties.size() + 1);
+    MatchedProperties& newProperties = m_matchedProperties.last();
     newProperties.properties = const_cast<StylePropertySet*>(properties);
     newProperties.m_types.linkMatchType = linkMatchType;
     newProperties.m_types.whitelistType = propertyWhitelistType;
 }
 
+void MatchResult::closeOriginOrScope(bool isUAOrigin)

[kochi, 2015/08/10 12:15:03]

What is this function is expected to do?

I'm still learning, and it may be obvious but I cannot infer
what this is expected to do from the name.

+{
+    if (!isUAOrigin) {
+        if (!m_matchedProperties.size())
+            return;
+        if (m_rangeEnd.size() && m_rangeEnd.last() == m_matchedProperties.size())
+            return;
+    }
+    m_rangeEnd.append(m_matchedProperties.size());
+}
+
 } // namespace blink