Only support AddFeatures invalidation set mode for :host or :any in a rightmost selector

Source/core/css/RuleFeature.h

Index: Source/core/css/RuleFeature.h
diff --git a/Source/core/css/RuleFeature.h b/Source/core/css/RuleFeature.h
index 75df79fbeea1d2ca93a0b868b1780b8c9337ae55..1d3c074069f500bae782595f79c4a266083c4fbc 100644
--- a/Source/core/css/RuleFeature.h
+++ b/Source/core/css/RuleFeature.h
@@ -129,7 +129,7 @@ private:
         UseSubtreeStyleChange
     };
 
-    static InvalidationSetMode supportsClassDescendantInvalidation(const CSSSelector&);
+    static InvalidationSetMode getInvalidationSetMode(const CSSSelector&);

[esprehn, 2014/04/02 00:20:58]

We don't usually use "get" like this, invalidationSetMode() or
invalidationSetModeForSelector() or something is what we usually do

[chrishtr, 2014/04/02 04:19:50]

Done.

 
     void collectFeaturesFromSelector(const CSSSelector&, FeatureMetadata&, InvalidationSetMode);
     void collectFeaturesFromSelectorList(const CSSSelectorList*, FeatureMetadata&, InvalidationSetMode);