Extract common per-network proxy configuration functions.

chrome/browser/chromeos/net/proxy_config_handler.h

+// Copyright (c) 2013 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 CHROME_BROWSER_CHROMEOS_NET_PROXY_CONFIG_HANDLER_H_
+#define CHROME_BROWSER_CHROMEOS_NET_PROXY_CONFIG_HANDLER_H_
+
+#include "base/memory/scoped_ptr.h"
+
+class ProxyConfigDictionary;
+
+namespace chromeos {
+
+class NetworkState;
+
+namespace proxy_config {
+
+scoped_ptr<ProxyConfigDictionary> GetProxyConfigForNetwork(
+    const NetworkState& network);
+
+void SetProxyConfigForNetwork(const ProxyConfigDictionary& proxy_config,
+                              const NetworkState& network);
+
+}  // namespace proxy_config
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_NET_PROXY_CONFIG_HANDLER_H_