Add ongoing events to net-export log when logging starts

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 206 matching lines @@
   // Allows overriding Globals in tests where IOThread::Init() and
   // IOThread::CleanUp() are not called.  This allows for injecting mocks into
   // IOThread global objects.
   void SetGlobalsForTesting(Globals* globals);
 
   net_log::ChromeNetLog* net_log();
 
   // Handles changing to On The Record mode, discarding confidential data.
   void ChangedToOnTheRecord();
 
-  // Returns a getter for the URLRequestContext.  Only called on the UI thread.
+  // Returns a getter for the system URLRequestContext. Only called on the UI

[eroman, 2017/02/22 02:03:29]

Please propose refactors io_thread as a separate CL.

Also note as a practical matter that I am not an OWNER for io_thread.{h,cc} so
you would need a different reviewer for those changes anyway.

[wangyix1, 2017/02/23 02:14:57]

Change reverted.

+  // thread.
   net::URLRequestContextGetter* system_url_request_context_getter();
 
   // Clears the host cache. Intended to be used to prevent exposing recently
   // visited sites on about:net-internals/#dns and about:dns pages.  Must be
   // called on the IO thread. If |host_filter| is not null, only hosts matched
   // by it are deleted from the cache.
   void ClearHostCache(
       const base::Callback<bool(const std::string&)>& host_filter);
 
   const net::HttpNetworkSession::Params& NetworkSessionParams() const;
@@ skipping 166 matching lines @@
   bool http_09_on_non_default_ports_enabled_;
 
   const base::TimeTicks creation_time_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_