Extract MediaListDirective and SourceListDirective from ContentSecurityPolicy.

Source/core/frame/csp/MediaListDirective.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 MediaListDirective_h
+#define MediaListDirective_h
+
+#include "core/frame/csp/CSPDirective.h"
+#include "platform/network/ContentSecurityPolicyParsers.h"
+#include "wtf/HashSet.h"
+#include "wtf/text/WTFString.h"
+
+namespace WebCore {
+
+class ContentSecurityPolicy;
+
+class MediaListDirective FINAL : public CSPDirective {
+    WTF_MAKE_NONCOPYABLE(MediaListDirective);
+public:
+    MediaListDirective(const String& name, const String& value, ContentSecurityPolicy*);
+    bool allows(const String& type);
+
+private:
+    void parse(const UChar* begin, const UChar* end);
+
+    HashSet<String> m_pluginTypes;
+};
+
+} // namespace WebCore
+
+#endif