Move some of IOThread's command line logic to network_session_configurator.

components/network_session_configurator/common/network_switches.h

+// Copyright 2017 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 COMPONENTS_NETWORK_SESSION_CONFIGURATOR_COMMON_NETWORK_SWITCHES_H_
+#define COMPONENTS_NETWORK_SESSION_CONFIGURATOR_COMMON_NETWORK_SWITCHES_H_
+
+namespace base {
+class CommandLine;
+}
+
+namespace switches {
+
+#define NETWORK_SWITCH(name, value) extern const char name[];
+#include "components/network_session_configurator/common/network_switch_list.h"
+#undef NETWORK_SWITCH
+
+}  // namespace switches
+
+namespace network_session_configurator {
+
+// Copies all command line switches the configurator handles from the |src|
+// CommandLine to the |dest| one.
+void CopyNetworkSwitches(const base::CommandLine& src_command_line,
+                         base::CommandLine* dest_command_line);
+
+}  // namespace network_session_configurator
+
+#endif  // COMPONENTS_NETWORK_SESSION_CONFIGURATOR_COMMON_NETWORK_SWITCHES_H_