Prepare for multiple !important author ranges.

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..7002031bf2aceae4a3d62c1d08bab3f19e398da5 100644
--- a/Source/core/css/resolver/MatchResult.cpp
+++ b/Source/core/css/resolver/MatchResult.cpp
@@ -50,11 +50,26 @@ 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::uaRulesFinished()
+{
+    m_uaRangeEnd = m_matchedProperties.size();
+}
+
+void MatchResult::authorScopeFinished()
+{
+    // Don't add empty ranges.
+    if (m_authorRangeEnd.isEmpty() && m_uaRangeEnd == m_matchedProperties.size())
+        return;
+    if (!m_authorRangeEnd.isEmpty() && m_authorRangeEnd.last() == m_matchedProperties.size())
+        return;
+    m_authorRangeEnd.append(m_matchedProperties.size());
+}
+
 } // namespace blink