Implement newly designed sign-in related histograms for desktop platorms.

chrome/browser/ui/user_manager.cc

Index: chrome/browser/ui/user_manager.cc
diff --git a/chrome/browser/ui/user_manager.cc b/chrome/browser/ui/user_manager.cc
index 2e826f861b27d3b9637319f85e99e121a9cbac65..9426c81d64e01ebffce2756e74a102999e78d600 100644
--- a/chrome/browser/ui/user_manager.cc
+++ b/chrome/browser/ui/user_manager.cc
@@ -44,7 +44,10 @@ void UserManager::ReauthDialogObserver::DidStopLoading() {
   // webview and observe it instead.  The webview may not be found in the
   // initial page load since it loads asynchronously.
   if (url.GetOrigin() !=
-        signin::GetReauthURLWithEmail(email_address_).GetOrigin()) {
+      signin::GetReauthURLWithEmail(
+          signin_metrics::AccessPoint::ACCESS_POINT_USER_MANAGER,
+          signin_metrics::Reason::REASON_UNLOCK, email_address_)
+          .GetOrigin()) {
     return;
   }