Extracting NetLog inner classes into their own classes.

components/net_log/net_log_file_writer.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 COMPONENTS_NET_LOG_NET_LOG_FILE_WRITER_H_
 #define COMPONENTS_NET_LOG_NET_LOG_FILE_WRITER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
-#include "net/log/net_log.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace net {
+class NetLogCaptureMode;
 class WriteToFileNetLogObserver;
 }
 
 namespace net_log {
 
 class ChromeNetLog;
 
 // NetLogFileWriter logs all the NetLog entries into a specified file.
 //
 // NetLogFileWriter maintains the current logging state (state_) and log file
@@ skipping 135 matching lines @@
 
   const base::CommandLine::StringType command_line_string_;
   const std::string channel_string_;
 
   DISALLOW_COPY_AND_ASSIGN(NetLogFileWriter);
 };
 
 }  // namespace net_log
 
 #endif  // COMPONENTS_NET_LOG_NET_LOG_FILE_WRITER_H_