Avoid nearly identical toImplArray() and toImplHeapArray()

Source/bindings/core/v8/DictionaryHelperForCore.cpp

Index: Source/bindings/core/v8/DictionaryHelperForCore.cpp
diff --git a/Source/bindings/core/v8/DictionaryHelperForCore.cpp b/Source/bindings/core/v8/DictionaryHelperForCore.cpp
index c13d7d9f40bdbee7a8d5f1a01a2d35151594ec36..3bee6a4f21dbb075b707389dd11bee72ad73e9fd 100644
--- a/Source/bindings/core/v8/DictionaryHelperForCore.cpp
+++ b/Source/bindings/core/v8/DictionaryHelperForCore.cpp
@@ -334,7 +334,7 @@ CORE_EXPORT bool DictionaryHelper::get(const Dictionary& dictionary, const Strin
         v8::Local<v8::Value> v8IndexedValue;
         if (!v8Array->Get(dictionary.v8Context(), v8::Uint32::New(dictionary.isolate(), i)).ToLocal(&v8IndexedValue))
             return false;
-        Vector<String> indexedValue = toImplArray<String>(v8IndexedValue, i, dictionary.isolate(), exceptionState);
+        Vector<String> indexedValue = toImplArray<Vector<String>>(v8IndexedValue, i, dictionary.isolate(), exceptionState);
         if (exceptionState.hadException())
             return false;
         value.append(indexedValue);