Add UMA metrics for profile switching.

chrome/browser/browser_shutdown.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/browser_shutdown.h"
 
 #include <map>
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/metrics/histogram.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread.h"
 #include "base/time/time.h"
 #include "chrome/browser/about_flags.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/first_run/upgrade_util.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/profiles/profile_metrics.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/crash_keys.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/switch_utils.h"
 #include "components/metrics/metrics_service.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 
 #if defined(OS_WIN)
@@ skipping 109 matching lines @@
 #if defined(ENABLE_PRINT_PREVIEW)
   // Shutdown the IPC channel to the service processes.
   ServiceProcessControl::GetInstance()->Disconnect();
 #endif  // ENABLE_PRINT_PREVIEW
 
   // WARNING: During logoff/shutdown (WM_ENDSESSION) we may not have enough
   // time to get here. If you have something that *must* happen on end session,
   // consider putting it in BrowserProcessImpl::EndSession.
   PrefService* prefs = g_browser_process->local_state();
 
+  // Log the amount of times the user switched profiles during this session.
+  ProfileMetrics::LogNumberOfProfileSwitches();
+
   metrics::MetricsService* metrics = g_browser_process->metrics_service();
   if (metrics)
     metrics->RecordCompletedSessionEnd();
 
   if (shutdown_type_ > NOT_VALID && shutdown_num_processes_ > 0) {
     // Record the shutdown info so that we can put it into a histogram at next
     // startup.
     prefs->SetInteger(prefs::kShutdownType, shutdown_type_);
     prefs->SetInteger(prefs::kShutdownNumProcesses, shutdown_num_processes_);
     prefs->SetInteger(prefs::kShutdownNumProcessesSlow,
@@ skipping 168 matching lines @@
 
 void SetTryingToQuit(bool quitting) {
   g_trying_to_quit = quitting;
 }
 
 bool IsTryingToQuit() {
   return g_trying_to_quit;
 }
 
 }  // namespace browser_shutdown