Missing return after class invalidation short-cut.

Source/core/css/RuleFeature.cpp

Index: Source/core/css/RuleFeature.cpp
diff --git a/Source/core/css/RuleFeature.cpp b/Source/core/css/RuleFeature.cpp
index 5e687d8fc44904f0e903dd10125386f6444d80cd..e92b68727c4c68d3b0ea83e5ad49c3bf61b2398d 100644
--- a/Source/core/css/RuleFeature.cpp
+++ b/Source/core/css/RuleFeature.cpp
@@ -446,8 +446,10 @@ void RuleFeatureSet::scheduleStyleInvalidationForClassChange(const SpaceSplitStr
 
 void RuleFeatureSet::scheduleStyleInvalidationForClassChange(const SpaceSplitString& oldClasses, const SpaceSplitString& newClasses, Element& element)
 {
-    if (!oldClasses.size())
+    if (!oldClasses.size()) {
         scheduleStyleInvalidationForClassChange(newClasses, element);
+        return;
+    }
 
     // Class vectors tend to be very short. This is faster than using a hash table.
     BitVector remainingClassBits;