[ServiceWorker] Implement Headers class.

Source/bindings/v8/Dictionary.h

 /*
  * 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 32 matching lines @@
 
 namespace WebCore {
 
 class ArrayValue;
 class DOMError;
 class Element;
 class LocalDOMWindow;
 class Gamepad;
 class MediaStream;
 class HeaderMap;
+class Headers;
 class IDBKeyRange;
 class MIDIPort;
 class MediaKeyError;
 class Notification;
 class SpeechRecognitionResult;
 class SpeechRecognitionResultList;
 class Storage;
 class TrackBase;
 class VoidCallback;
 
@@ skipping 34 matching lines @@
     bool get(const String&, Member<Gamepad>&) const;
     bool get(const String&, Member<MediaStream>&) const;
     bool get(const String&, RefPtrWillBeMember<EventTarget>&) const;
     bool get(const String&, HashSet<AtomicString>&) const;
     bool get(const String&, Dictionary&) const;
     bool get(const String&, Vector<String>&) const;
     bool get(const String&, ArrayValue&) const;
     bool get(const String&, RefPtrWillBeMember<DOMError>&) const;
     bool get(const String&, v8::Local<v8::Value>&) const;
     bool get(const String&, RefPtr<HeaderMap>&) const;
+    bool get(const String&, RefPtr<Headers>&) const;
 
     class ConversionContext {
     public:
         ConversionContext(const String& interfaceName, const String& methodName, ExceptionState& exceptionState)
             : m_interfaceName(interfaceName)
             , m_methodName(methodName)
             , m_exceptionState(exceptionState)
             , m_dirty(true)
         {
             resetPerPropertyContext();
@@ skipping 225 matching lines @@
     if (context.isNullable() && WebCore::isUndefinedOrNull(v8Value))
         return true;
 
     context.throwTypeError(ExceptionMessages::incorrectPropertyType(key, "does not have a " + context.typeName() + " type."));
     return false;
 }
 
 }
 
 #endif // Dictionary_h