[ServiceWorker] Make Response class better conformance with the spec.

Source/modules/serviceworkers/HeaderMap.cpp

-// 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.
-
-#include "config.h"
-#include "modules/serviceworkers/HeaderMap.h"
-
-#include "bindings/core/v8/ExceptionState.h"
-#include "modules/serviceworkers/HeaderMapForEachCallback.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefPtr.h"
-#include "wtf/text/WTFString.h"
-
-namespace WebCore {
-
-PassRefPtr<HeaderMap> HeaderMap::create()
-{
-    return adoptRef(new HeaderMap);
-}
-
-PassRefPtr<HeaderMap> HeaderMap::create(const HashMap<String, String>& headers)
-{
-    return adoptRef(new HeaderMap(headers));
-}
-
-unsigned long HeaderMap::size() const
-{
-    return m_headers.size();
-}
-
-void HeaderMap::clear()
-{
-    m_headers.clear();
-}
-
-bool HeaderMap::remove(const String& key)
-{
-    if (!has(key))
-        return false;
-    m_headers.remove(key);
-    return true;
-}
-
-String HeaderMap::get(const String& key)
-{
-    return m_headers.get(key);
-}
-
-bool HeaderMap::has(const String& key)
-{
-    return m_headers.find(key) != m_headers.end();
-}
-
-void HeaderMap::set(const String& key, const String& value)
-{
-    m_headers.set(key, value);
-}
-
-void HeaderMap::forEach(PassOwnPtr<HeaderMapForEachCallback> callback, ScriptValue& thisArg)
-{
-    forEachInternal(callback, &thisArg);
-}
-
-void HeaderMap::forEach(PassOwnPtr<HeaderMapForEachCallback> callback)
-{
-    forEachInternal(callback, 0);
-}
-
-HeaderMap::HeaderMap()
-{
-    ScriptWrappable::init(this);
-}
-
-HeaderMap::HeaderMap(const HashMap<String, String>& headers)
-    : m_headers(headers)
-{
-    ScriptWrappable::init(this);
-}
-
-void HeaderMap::forEachInternal(PassOwnPtr<HeaderMapForEachCallback> callback, ScriptValue* thisArg)
-{
-    TrackExceptionState exceptionState;
-    for (HashMap<String, String>::const_iterator it = m_headers.begin(); it != m_headers.end(); ++it) {
-        if (thisArg)
-            callback->handleItem(*thisArg, it->value, it->key, this);
-        else
-            callback->handleItem(it->value, it->key, this);
-        if (exceptionState.hadException())
-            break;
-    }
-}
-
-} // namespace WebCore