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

Source/core/css/resolver/MatchedPropertiesCache.cpp

Index: Source/core/css/resolver/MatchedPropertiesCache.cpp
diff --git a/Source/core/css/resolver/MatchedPropertiesCache.cpp b/Source/core/css/resolver/MatchedPropertiesCache.cpp
index cbd9419cf4eae250937f17f1401a1438b7da66e5..860c5c0a10918e1d10d77243d6b3f844b39b8ca0 100644
--- a/Source/core/css/resolver/MatchedPropertiesCache.cpp
+++ b/Source/core/css/resolver/MatchedPropertiesCache.cpp
@@ -95,9 +95,9 @@ void MatchedPropertiesCache::add(const RenderStyle* style, const RenderStyle* pa
     ASSERT(hash);
     Cache::AddResult addResult = m_cache.add(hash, nullptr);
     if (addResult.isNewEntry)
-        addResult.iterator->value = adoptPtr(new CachedMatchedProperties);
+        addResult.storedValue->value = adoptPtr(new CachedMatchedProperties);
 
-    CachedMatchedProperties* cacheItem = addResult.iterator->value.get();
+    CachedMatchedProperties* cacheItem = addResult.storedValue->value.get();
     if (!addResult.isNewEntry)
         cacheItem->clear();