Clean up QUIC field trial parsing code.

chrome/browser/io_thread.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 CHROME_BROWSER_IO_THREAD_H_
 #define CHROME_BROWSER_IO_THREAD_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 338 matching lines @@
   // performed by Chromium, and false if the OS should select the port.  The OS
   // option is used to prevent Windows from posting a security security warning
   // dialog.
   static bool ShouldEnableQuicPortSelection(
       const base::CommandLine& command_line);
 
   // Returns true if QUIC packet pacing should be negotiated during the
   // QUIC handshake.
   static bool ShouldEnableQuicPacing(
       const base::CommandLine& command_line,
-      base::StringPiece quic_trial_group,
       const VariationParameters& quic_trial_params);
 
   // Returns true if QUIC should always require handshake confirmation during
   // the QUIC handshake.
   static bool ShouldQuicAlwaysRequireHandshakeConfirmation(
       const VariationParameters& quic_trial_params);
 
   // Returns true if QUIC should disable connection pooling.
   static bool ShouldQuicDisableConnectionPooling(
       const VariationParameters& quic_trial_params);
@@ skipping 16 matching lines @@
 
   // Returns true if QUIC's TruncatedConnectionIds should be enabled.
   static bool ShouldQuicEnableTruncatedConnectionIds(
       const VariationParameters& quic_trial_params);
 
   // Returns the maximum length for QUIC packets, based on any flags in
   // |command_line| or the field trial.  Returns 0 if there is an error
   // parsing any of the options, or if the default value should be used.
   static size_t GetQuicMaxPacketLength(
       const base::CommandLine& command_line,
-      base::StringPiece quic_trial_group,
       const VariationParameters& quic_trial_params);
 
   // Returns the QUIC versions specified by any flags in |command_line|
   // or |quic_trial_params|.
   static net::QuicVersion GetQuicVersion(
       const base::CommandLine& command_line,
       const VariationParameters& quic_trial_params);
 
   // Returns the QUIC version specified by |quic_version| or
   // QUIC_VERSION_UNSUPPORTED if |quic_version| is invalid.
@@ skipping 66 matching lines @@
   bool is_spdy_disabled_by_policy_;
 
   const base::TimeTicks creation_time_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_