Implement proposed shadow tree cascade order.

Source/core/css/resolver/MatchResult.cpp

Index: Source/core/css/resolver/MatchResult.cpp
diff --git a/Source/core/css/resolver/MatchResult.cpp b/Source/core/css/resolver/MatchResult.cpp
index f61efb393a1d710ac28c755c763487ea0c0105d7..ae10d7574c6eea7ba5a42f472fc62a47922e2294 100644
--- a/Source/core/css/resolver/MatchResult.cpp
+++ b/Source/core/css/resolver/MatchResult.cpp
@@ -50,11 +50,22 @@ DEFINE_TRACE(MatchedProperties)
 
 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