Simpler return value from HashTable::add()/HashMap::add() and others

Source/platform/fonts/mac/SimpleFontDataCoreText.cpp

Index: Source/platform/fonts/mac/SimpleFontDataCoreText.cpp
diff --git a/Source/platform/fonts/mac/SimpleFontDataCoreText.cpp b/Source/platform/fonts/mac/SimpleFontDataCoreText.cpp
index 80a146e1f4828287b0c11d4c04ca798468479414..a9563507d33b96d912f586dba39bdc4ade2ea95f 100644
--- a/Source/platform/fonts/mac/SimpleFontDataCoreText.cpp
+++ b/Source/platform/fonts/mac/SimpleFontDataCoreText.cpp
@@ -35,7 +35,7 @@ CFDictionaryRef SimpleFontData::getCFStringAttributes(TypesettingFeatures typese
 {
     unsigned key = typesettingFeatures + 1;
     HashMap<unsigned, RetainPtr<CFDictionaryRef> >::AddResult addResult = m_CFStringAttributes.add(key, RetainPtr<CFDictionaryRef>());
-    RetainPtr<CFDictionaryRef>& attributesDictionary = addResult.iterator->value;
+    RetainPtr<CFDictionaryRef>& attributesDictionary = addResult.storedValue->value;
     if (!addResult.isNewEntry)
         return attributesDictionary.get();