Avoid nearly identical toImplArray() and toImplHeapArray()

Source/bindings/core/v8/DictionaryHelperForCore.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 316 matching lines @@
         return false;
 
     if (!v8Value->IsArray())
         return false;
 
     v8::Local<v8::Array> v8Array = v8::Local<v8::Array>::Cast(v8Value);
     for (size_t i = 0; i < v8Array->Length(); ++i) {
         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);
     }
 
     return true;
 }
 
 template <>
 bool DictionaryHelper::convert(const Dictionary& dictionary, Dictionary::ConversionContext& context, const String& key, Vector<String>& value)
@@ skipping 193 matching lines @@
 
     value = toRefPtrWillBeMemberNativeArray<MessagePort, V8MessagePort>(v8Value, key, dictionary.isolate(), context.exceptionState());
 
     if (context.exceptionState().throwIfNeeded())
         return false;
 
     return true;
 }
 
 } // namespace blink