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

components/network_session_configurator/network_session_configurator.h

-// Copyright 2016 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.
-
-// Helper functions to configure HttpNetworkSession::Params based on field
-// trials, policy, and command line.
-
-#ifndef COMPONENTS_NETWORK_SESSION_CONFIGURATOR_NETWORK_SESSION_CONFIGURATOR_H_
-#define COMPONENTS_NETWORK_SESSION_CONFIGURATOR_NETWORK_SESSION_CONFIGURATOR_H_
-
-#include <string>
-
-#include "net/http/http_network_session.h"
-
-namespace network_session_configurator {
-
-// Parse serialized QUIC version string.
-// Return QUIC_VERSION_UNSUPPORTED on failure.
-net::QuicVersion ParseQuicVersion(const std::string& quic_version);
-
-// Configure |params| based on field trials
-// and forcing (policy or command line) arguments.
-void ParseFieldTrials(bool is_quic_force_disabled,
-                      bool is_quic_force_enabled,
-                      const std::string& quic_user_agent_id,
-                      net::HttpNetworkSession::Params* params);
-
-}  // namespace network_session_configurator
-
-#endif  // COMPONENTS_NETWORK_SESSION_CONFIGURATOR_NETWORK_SESSION_CONFIGURATOR_H_