Add iOS support to ProxyService

net/proxy/proxy_config_service_ios.h

+// Copyright (c) 2012 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 NET_PROXY_PROXY_CONFIG_SERVICE_IOS_H_
+#define NET_PROXY_PROXY_CONFIG_SERVICE_IOS_H_
+
+#include "net/proxy/polling_proxy_config_service.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}  // namespace base
+
+namespace net {
+
+class ProxyConfigServiceIOS : public PollingProxyConfigService {
+ public:
+  // Constructs a ProxyConfigService that watches the iOS system proxy settings.
+  // This instance is expected to be operated and deleted on the IO thread

[Ryan Sleevi, 2012/09/05 02:59:21]

drive by comment nit: willchan has pointed out in past reviews "the IO thread"
is an implementation-specific detail of "Chrome" (as in src/chrome). The
preference is to call this "the network thread" or even say "on the same thread"

+  // (however it may be constructed from a different thread).
+  explicit ProxyConfigServiceIOS(
+      base::SingleThreadTaskRunner* io_thread_task_runner);
+  virtual ~ProxyConfigServiceIOS();
+
+ private:
+  // The thread that we expect to be operated on.
+  scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProxyConfigServiceIOS);
+};
+
+}  // namespace net
+
+#endif  // NET_PROXY_PROXY_CONFIG_SERVICE_IOS_H_