Perf test of disabling ChromeNetLog.

chrome/browser/net/chrome_net_log.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/net/chrome_net_log.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 70 matching lines @@
 }
 
 void ChromeNetLog::AddEntry(EventType type,
                             const base::TimeTicks& time,
                             const Source& source,
                             EventPhase phase,
                             EventParameters* params) {
   AutoLock lock(lock_);
 
   // Notify all of the log observers.
+#if 0
   FOR_EACH_OBSERVER(ThreadSafeObserver, observers_,
                     OnAddEntry(type, time, source, phase, params));
+#endif
 }
 
 uint32 ChromeNetLog::NextID() {
   return base::subtle::NoBarrier_AtomicIncrement(&last_id_, 1);
 }
 
 net::NetLog::LogLevel ChromeNetLog::GetLogLevel() const {
   base::subtle::Atomic32 log_level = base::subtle::NoBarrier_Load(&log_level_);
   return static_cast<net::NetLog::LogLevel>(log_level);
 }
@@ skipping 41 matching lines @@
   }
   base::subtle::NoBarrier_Store(&log_level_, new_log_level);
 }
 
 void ChromeNetLog::AddObserverWhileLockHeld(ThreadSafeObserver* observer) {
   DCHECK(!observer->net_log_);
   observer->net_log_ = this;
   observers_.AddObserver(observer);
   UpdateLogLevel_();
 }