Add TRACE_EVENT macros to net.

net/base/network_quality_estimator.cc

 // Copyright 2015 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 "net/base/network_quality_estimator.h"
 
 #include <float.h>
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <utility>
 #include <vector>
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_base.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
 #include "net/base/load_flags.h"
 #include "net/base/load_timing_info.h"
 #include "net/base/network_interfaces.h"
 #include "net/base/url_util.h"
 #include "net/url_request/url_request.h"
 #include "url/gurl.h"
 
 #if defined(OS_ANDROID)
 #include "net/android/network_library.h"
@@ skipping 205 matching lines @@
     NotifyObserversOfThroughput(throughput_observation);
   }
 }
 
 NetworkQualityEstimator::~NetworkQualityEstimator() {
   DCHECK(thread_checker_.CalledOnValidThread());
   NetworkChangeNotifier::RemoveConnectionTypeObserver(this);
 }
 
 void NetworkQualityEstimator::NotifyHeadersReceived(const URLRequest& request) {
+  TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("net"),
+               "NetworkQualityEstimator::NotifyHeadersReceived");
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (!RequestProvidesUsefulObservations(request))
     return;
 
   // Update |estimated_median_network_quality_| if this is a main frame request.
   if (request.load_flags() & LOAD_MAIN_FRAME) {
     estimated_median_network_quality_ = NetworkQuality(
         GetRTTEstimateInternal(base::TimeTicks(), 50),
         GetDownlinkThroughputKbpsEstimateInternal(base::TimeTicks(), 50));
@@ skipping 31 matching lines @@
 
     // Compare the RTT observation with the estimated value and record it.
     if (estimated_median_network_quality_.rtt() != InvalidRTT()) {
       RecordRTTUMA(estimated_median_network_quality_.rtt().InMilliseconds(),
                    observed_rtt.InMilliseconds());
     }
 }
 
 void NetworkQualityEstimator::NotifyRequestCompleted(
     const URLRequest& request) {
+  TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("net"),
+               "NetworkQualityEstimator::NotifyRequestCompleted");
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (!RequestProvidesUsefulObservations(request))
     return;
 
   base::TimeTicks now = base::TimeTicks::Now();
   LoadTimingInfo load_timing_info;
   request.GetLoadTimingInfo(&load_timing_info);
 
   // If the load timing info is unavailable, it probably means that the request
@@ skipping 664 matching lines @@
 
 NetworkQualityEstimator::NetworkQuality&
     NetworkQualityEstimator::NetworkQuality::
     operator=(const NetworkQuality& other) {
   rtt_ = other.rtt_;
   downstream_throughput_kbps_ = other.downstream_throughput_kbps_;
   return *this;
 }
 
 }  // namespace net