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

Source/core/dom/shadow/ElementShadow.cpp

Index: Source/core/dom/shadow/ElementShadow.cpp
diff --git a/Source/core/dom/shadow/ElementShadow.cpp b/Source/core/dom/shadow/ElementShadow.cpp
index 3c7548af6d5f893409c665ea3e18f26262a01d32..17ee8ba1a2642dd3fcd6c558751a6490fd3d2323 100644
--- a/Source/core/dom/shadow/ElementShadow.cpp
+++ b/Source/core/dom/shadow/ElementShadow.cpp
@@ -335,7 +335,7 @@ void ElementShadow::distribute()
 void ElementShadow::didDistributeNode(const Node* node, InsertionPoint* insertionPoint)
 {
     NodeToDestinationInsertionPoints::AddResult result = m_nodeToInsertionPoints.add(node, DestinationInsertionPoints());
-    result.iterator->value.append(insertionPoint);
+    result.storedValue->value.append(insertionPoint);
 }
 
 const SelectRuleFeatureSet& ElementShadow::ensureSelectFeatureSet()