ServiceWorker: support Request.{url,method,origin,headers} [blink] (1/3)

Source/modules/serviceworkers/HeaderMap.h

 // Copyright 2014 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.
 
 #ifndef HeaderMap_h
 #define HeaderMap_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "wtf/Forward.h"
 #include "wtf/HashMap.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/StringHash.h"
 
 namespace WebCore {
 
 class HeaderMapForEachCallback;
 class ScriptValue;
 
 class HeaderMap FINAL : public ScriptWrappable, public RefCounted<HeaderMap> {
 public:
     static PassRefPtr<HeaderMap> create();
+    static PassRefPtr<HeaderMap> create(const HashMap<String, String>& headers);
 
     // HeaderMap.idl implementation.
     unsigned long size() const;
     void clear();
     bool remove(const String& key);
     String get(const String& key);
     bool has(const String& key);
     void set(const String& key, const String& value);
     void forEach(PassOwnPtr<HeaderMapForEachCallback>, ScriptValue&);
     void forEach(PassOwnPtr<HeaderMapForEachCallback>);
 
     const HashMap<String, String>& headerMap() const { return m_headers; }
 
 private:
     HeaderMap();
+    explicit HeaderMap(const HashMap<String, String>& headers);
     void forEachInternal(PassOwnPtr<HeaderMapForEachCallback>, ScriptValue* thisArg);
 
     // FIXME: this doesn't preserve ordering while ES6 Map type requires it.
     HashMap<String, String> m_headers;
 };
 
 } // namespace WebCore
 
 #endif // HeaderMap_h