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diff --git a/WebCore/platform/network/ProxyServer.h b/WebCore/platform/network/ProxyServer.h
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+/*
+ * Copyright (C) 2010 Apple 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
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ProxyServer_h
+#define ProxyServer_h
+
+#include <wtf/Vector.h>
+#include <wtf/text/WTFString.h>
+
+namespace WebCore {
+
+class KURL;
+class NetworkingContext;
+
+// Represents a single proxy server.
+class ProxyServer {
+public:
+    enum Type {
+        Direct,
+        HTTP,
+        HTTPS,
+        SOCKS,
+    };
+
+    ProxyServer()
+        : m_type(Direct)
+        , m_port(-1)
+    {
+    }
+
+    ProxyServer(Type type, const String& hostName, int port)
+        : m_type(type)
+        , m_hostName(hostName)
+        , m_port(port)
+    {
+    }
+        
+    Type type() const { return m_type; }
+    const String& hostName() const { return m_hostName; }
+    int port() const { return m_port; }
+
+private:
+    Type m_type;
+    String m_hostName;
+    int m_port;
+};
+
+// Return a vector of proxy servers for the given URL.
+Vector<ProxyServer> proxyServersForURL(const KURL&, const NetworkingContext*);
+
+// Converts the given vector of proxy servers to a PAC string, as described in
+// http://web.archive.org/web/20060424005037/wp.netscape.com/eng/mozilla/2.0/relnotes/demo/proxy-live.html
+String toString(const Vector<ProxyServer>&);
+    
+} // namespace WebCore
+
+#endif // ProxyServer_h