Add Profile metric counting to new User Manager.

chrome/browser/ui/views/user_manager_view.cc

Index: chrome/browser/ui/views/user_manager_view.cc
diff --git a/chrome/browser/ui/views/user_manager_view.cc b/chrome/browser/ui/views/user_manager_view.cc
index 62ee25014ce68fdd137b281a92edc102b36f81e2..8635ef45ea8bbd9a3a175c32d2794e1aa1114357 100644
--- a/chrome/browser/ui/views/user_manager_view.cc
+++ b/chrome/browser/ui/views/user_manager_view.cc
@@ -8,6 +8,7 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/profiles/profile_metrics.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_window.h"
@@ -71,6 +72,7 @@ void UserManagerView::Show(const base::FilePath& profile_path_to_focus) {
   // Prevent the browser process from shutting down while this window is open.
   chrome::StartKeepAlive();
 
+  ProfileMetrics::LogProfileSwitchUser(ProfileMetrics::OPEN_USER_MANAGER);
   if (instance_) {
     // If there's a user manager window open already, just activate it.
     instance_->GetWidget()->Activate();