Use invalidation sets for :unresolved.

third_party/WebKit/Source/core/css/RuleFeature.cpp

Index: third_party/WebKit/Source/core/css/RuleFeature.cpp
diff --git a/third_party/WebKit/Source/core/css/RuleFeature.cpp b/third_party/WebKit/Source/core/css/RuleFeature.cpp
index ad28c411a459d43f0eda47b665d10ae3ca326788..0aff55d88fce28052a519ff4e190d685c97002b3 100644
--- a/third_party/WebKit/Source/core/css/RuleFeature.cpp
+++ b/third_party/WebKit/Source/core/css/RuleFeature.cpp
@@ -292,6 +292,8 @@ InvalidationSet* RuleFeatureSet::invalidationSetForSelector(const CSSSelector& s
         case CSSSelector::PseudoActive:
         case CSSSelector::PseudoChecked:
         case CSSSelector::PseudoEnabled:
+        // TODO(rune@opera.com): crbug.com/557683 :default is currently not updated dynamically.
+        // case CSSSelector::Default:
         case CSSSelector::PseudoDisabled:
         case CSSSelector::PseudoOptional:
         case CSSSelector::PseudoPlaceholderShown:
@@ -300,6 +302,7 @@ InvalidationSet* RuleFeatureSet::invalidationSetForSelector(const CSSSelector& s
         case CSSSelector::PseudoInvalid:
         case CSSSelector::PseudoIndeterminate:
         case CSSSelector::PseudoTarget:
+        case CSSSelector::PseudoUnresolved:
             return &ensurePseudoInvalidationSet(selector.pseudoType(), type);
         default:
             break;