First cut at UI for saving net_logs data into a temporary file on

chrome/browser/net/net_log_logger.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_NET_NET_LOG_LOGGER_H_
 #define CHROME_BROWSER_NET_NET_LOG_LOGGER_H_
 
 #include "base/memory/scoped_handle.h"
 #include "net/base/net_log.h"
 
@@ skipping 14 matching lines @@
   // If |log_path| is empty or file creation fails, writes to VLOG(1).
   // Otherwise, writes to |log_path|.  Uses one line per entry, for
   // easy parsing.
   explicit NetLogLogger(const FilePath &log_path);
   virtual ~NetLogLogger();
 
   // Starts observing specified NetLog.  Must not already be watching a NetLog.
   // Separate from constructor to enforce thread safety.
   void StartObserving(net::NetLog* net_log);
 
+  // Stops observing net_log().  Must already be watching.
+  void StopObserving();
+
   // net::NetLog::ThreadSafeObserver implementation:
   virtual void OnAddEntry(const net::NetLog::Entry& entry) OVERRIDE;
 
  private:
   ScopedStdioHandle file_;
 
   DISALLOW_COPY_AND_ASSIGN(NetLogLogger);
 };
 
 #endif  // CHROME_BROWSER_NET_NET_LOG_LOGGER_H_