Add a tuple of name, local name for hashing custom element definitions.

third_party/WebKit/Source/core/dom/custom/CustomElementDefinition.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/dom/custom/CustomElementDefinition.h"
 
 namespace blink {
 
 CustomElementDefinition::CustomElementDefinition(
     CustomElementsRegistry* registry,
     CustomElementsRegistry::Id id,
-    const AtomicString& localName)
+    const CustomElementDescriptor& descriptor)
     : m_registry(registry)
     , m_id(id)
-    , m_localName(localName)
+    , m_descriptor(descriptor)
 {
 }
 
 v8::Local<v8::Object> CustomElementDefinition::prototype(
     ScriptState* scriptState) const
 {
     return m_registry->prototype(scriptState, *this);
 }
 
 } // namespace blink