[Clean-up] Remove NetworkStats code, which has been dead code since July 2014.

BUG=470630
TEST=none
R=rtenneti@chromium.org

Review URL: https://codereview.chromium.org/1031203002

Cr-Commit-Position: refs/heads/master@{#322261}

chrome/browser/metrics/chrome_metrics_service_client.cc

@@ -25,6 +25,7 @@
 #include "chrome/browser/metrics/chrome_stability_metrics_provider.h"
 #include "chrome/browser/metrics/drive_metrics_provider.h"
 #include "chrome/browser/metrics/omnibox_metrics_provider.h"
+#include "chrome/browser/metrics/time_ticks_experiment_win.h"
 #include "chrome/browser/ui/browser_otr_state.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_switches.h"
@@ -220,8 +221,10 @@ std::string ChromeMetricsServiceClient::GetVersionString() {
 }
 
 void ChromeMetricsServiceClient::OnLogUploadComplete() {
-  // Collect network stats after each UMA upload.
-  network_stats_uploader_.CollectAndReportNetworkStats();
+  // Collect time ticks stats after each UMA upload.
+#if defined(OS_WIN)
+  chrome::CollectTimeTicksStats();
+#endif
 }
 
 void ChromeMetricsServiceClient::StartGatheringMetrics(

chrome/browser/metrics/chrome_metrics_service_client.h

@@ -13,7 +13,6 @@
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "chrome/browser/metrics/metrics_memory_details.h"
-#include "chrome/browser/metrics/network_stats_uploader.h"
 #include "components/metrics/metrics_service_client.h"
 #include "components/metrics/profiler/tracking_synchronizer_observer.h"
 #include "content/public/browser/notification_observer.h"
@@ -24,6 +23,7 @@ class DriveMetricsProvider;
 class GoogleUpdateMetricsProviderWin;
 class PluginMetricsProvider;
 class PrefRegistrySimple;
+class PrefService;
 
 #if !defined(OS_CHROMEOS) && !defined(OS_IOS)
 class SigninStatusMetricsProvider;
@@ -140,8 +140,6 @@ class ChromeMetricsServiceClient
   // that has been registered with MetricsService. On other platforms, is NULL.
   ChromeOSMetricsProvider* chromeos_metrics_provider_;
 
-  NetworkStatsUploader network_stats_uploader_;
-
   // Saved callback received from CollectFinalMetrics().
   base::Closure collect_final_metrics_done_callback_;
 

chrome/browser/metrics/network_stats_uploader.cc

-// Copyright 2014 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/metrics/network_stats_uploader.h"
-
-#include "chrome/browser/browser_process.h"
-#include "chrome/browser/metrics/time_ticks_experiment_win.h"
-#include "chrome/browser/net/network_stats.h"
-#include "chrome/common/net/test_server_locations.h"
-
-#if !defined(OS_POSIX)
-#include "chrome/installer/util/browser_distribution.h"
-#endif
-
-NetworkStatsUploader::NetworkStatsUploader() {
-#if defined(OS_POSIX)
-  network_stats_server_ = chrome_common_net::kEchoTestServerLocation;
-#else
-  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
-  network_stats_server_ = dist->GetNetworkStatsServer();
-#endif
-}
-
-NetworkStatsUploader::~NetworkStatsUploader() {
-}
-
-void NetworkStatsUploader::CollectAndReportNetworkStats() {
-  IOThread* io_thread = g_browser_process->io_thread();
-  if (!io_thread)
-    return;
-
-  chrome_browser_net::CollectNetworkStats(network_stats_server_, io_thread);
-#if defined(OS_WIN)
-  chrome::CollectTimeTicksStats();
-#endif
-}

chrome/browser/metrics/network_stats_uploader.h

-// Copyright 2014 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_METRICS_NETWORK_STATS_UPLOADER_H_
-#define CHROME_BROWSER_METRICS_NETWORK_STATS_UPLOADER_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-
-class PrefService;
-class PrefRegistrySimple;
-
-// NetworkStatsUploader implements the collection of various network stats,
-// which is done upon successful transmission of an UMA log.
-class NetworkStatsUploader {
- public:
-  NetworkStatsUploader();
-  ~NetworkStatsUploader();
-
-  // Collects and reports various network stats to external servers.
-  void CollectAndReportNetworkStats();
-
- private:
-  // The TCP/UDP echo server to collect network connectivity stats.
-  std::string network_stats_server_;
-
-  DISALLOW_COPY_AND_ASSIGN(NetworkStatsUploader);
-};
-
-#endif  // CHROME_BROWSER_METRICS_NETWORK_STATS_UPLOADER_H_

chrome/chrome_browser.gypi

@@ -1733,8 +1733,6 @@
       'browser/metrics/metrics_reporting_state.h',
       'browser/metrics/metrics_services_manager.cc',
       'browser/metrics/metrics_services_manager.h',
-      'browser/metrics/network_stats_uploader.cc',
-      'browser/metrics/network_stats_uploader.h',
       'browser/metrics/omnibox_metrics_provider.cc',
       'browser/metrics/omnibox_metrics_provider.h',
       'browser/metrics/perf_provider_chromeos.cc',
@@ -1814,8 +1812,6 @@
       'browser/net/net_log_temp_file.h',
       'browser/net/net_pref_observer.cc',
       'browser/net/net_pref_observer.h',
-      'browser/net/network_stats.cc',
-      'browser/net/network_stats.h',
       'browser/net/preconnect.cc',
       'browser/net/preconnect.h',
       'browser/net/prediction_options.cc',

chrome/chrome_tests_unit.gypi

@@ -156,7 +156,6 @@
       'browser/net/evicted_domain_cookie_counter_unittest.cc',
       'browser/net/net_error_tab_helper_unittest.cc',
       'browser/net/net_log_temp_file_unittest.cc',
-      'browser/net/network_stats_unittest.cc',
       'browser/net/predictor_unittest.cc',
       'browser/net/pref_proxy_config_tracker_impl_unittest.cc',
       'browser/net/probe_message_unittest.cc',