Report Login.SuccessReason in LoginPerformer

chromeos/login/auth/login_performer.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 "chromeos/login/auth/login_performer.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 61 matching lines @@
   } else {
     // COULD_NOT_MOUNT_CRYPTOHOME, COULD_NOT_MOUNT_TMPFS:
     // happens during offline auth only.
     NOTREACHED();
   }
 }
 
 void LoginPerformer::OnAuthSuccess(const UserContext& user_context) {
   DCHECK(task_runner_->RunsTasksOnCurrentThread());
   base::RecordAction(UserMetricsAction("Login_Success"));
+
+  // Do not distinguish between offline and online success.
+  UMA_HISTOGRAM_ENUMERATION("Login.SuccessReason", OFFLINE_AND_ONLINE,
+                            NUM_SUCCESS_REASONS);
+
   VLOG(1) << "LoginSuccess hash: " << user_context.GetUserIDHash();
   DCHECK(delegate_);
   // After delegate_->OnAuthSuccess(...) is called, delegate_ releases
   // LoginPerformer ownership. LP now manages it's lifetime on its own.
   base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
   delegate_->OnAuthSuccess(user_context);
 }
 
 void LoginPerformer::OnOffTheRecordAuthSuccess() {
   DCHECK(task_runner_->RunsTasksOnCurrentThread());
@@ skipping 214 matching lines @@
   } else {
     NOTREACHED();
   }
   user_context_.ClearSecrets();
 }
 
 void LoginPerformer::EnsureAuthenticator() {
   authenticator_ = CreateAuthenticator();
 }
 }  // namespace chromeos