Histograms - Support histograms for Plugins, GPU

chrome/browser/chrome_browser_main.cc

 // 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.
 
 #include "chrome/browser/chrome_browser_main.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 34 matching lines @@
 #include "chrome/browser/extensions/extensions_startup.h"
 #include "chrome/browser/first_run/upgrade_util.h"
 #include "chrome/browser/google/google_search_counter.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/gpu_blacklist.h"
 #include "chrome/browser/gpu_util.h"
 #include "chrome/browser/jankometer.h"
 #include "chrome/browser/language_usage_metrics.h"
 #include "chrome/browser/managed_mode.h"
 #include "chrome/browser/metrics/field_trial_synchronizer.h"
-#include "chrome/browser/metrics/histogram_synchronizer.h"
 #include "chrome/browser/metrics/metrics_log.h"
 #include "chrome/browser/metrics/metrics_service.h"
 #include "chrome/browser/metrics/thread_watcher.h"
 #include "chrome/browser/metrics/tracking_synchronizer.h"
 #include "chrome/browser/metrics/variations_service.h"
 #include "chrome/browser/nacl_host/nacl_process_host.h"
 #include "chrome/browser/net/chrome_net_log.h"
 #include "chrome/browser/net/predictor.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
 #include "chrome/browser/notifications/desktop_notification_service_factory.h"
@@ skipping 1329 matching lines @@
     WarnAboutMinimumSystemRequirements();
 
 #if defined(OS_LINUX) || defined(OS_OPENBSD) || defined(OS_MACOSX)
   // Set the product channel for crash reports.
   child_process_logging::SetChannel(
       chrome::VersionInfo::GetVersionStringModifier());
 #endif
 
   InitializeNetworkOptions(parsed_command_line());
 
-  // Initialize histogram synchronizer system. This is a singleton and is used
-  // for posting tasks via base::Bind. Its deleted when it goes out of scope.
-  // Even though base::Bind does AddRef and Release, the object will not
-  // be deleted after the Task is executed.
-  histogram_synchronizer_ = new HistogramSynchronizer();
+  // Initialize tracking synchronizer system.
   tracking_synchronizer_ = new chrome_browser_metrics::TrackingSynchronizer();
 
   // Now that all preferences have been registered, set the install date
   // for the uninstall metrics if this is our first run. This only actually
   // gets used if the user has metrics reporting enabled at uninstall time.
   int64 install_date =
       local_state_->GetInt64(prefs::kUninstallMetricsInstallDate);
   if (install_date == 0) {
     local_state_->SetInt64(prefs::kUninstallMetricsInstallDate,
                           base::Time::Now().ToTimeT());
@@ skipping 655 matching lines @@
     if (base::win::GetVersion() <= base::win::VERSION_XP)
       uma_name += "_XP";
 
     uma_name += "_PreRead_";
     uma_name += pre_read_percentage;
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }