Log UMA metrics for multiprofile actions.

ash/multi_profile_uma.cc

Index: ash/multi_profile_uma.cc
diff --git a/ash/multi_profile_uma.cc b/ash/multi_profile_uma.cc
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+++ b/ash/multi_profile_uma.cc
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+// Copyright 2013 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 "ash/multi_profile_uma.h"
+
+#include "base/metrics/histogram.h"
+
+namespace ash {
+
+// static
+void MultiProfileUMA::RecordSwitchActiveUser(SwitchActiveUserAction action) {
+  UMA_HISTOGRAM_ENUMERATION("MultiProfile.SwitchActiveUserUIPath",
+                            action,
+                            NUM_SWITCH_ACTIVE_USER_ACTIONS);
+}
+
+// static
+void MultiProfileUMA::RecordSigninUser(SigninUserAction action) {
+  UMA_HISTOGRAM_ENUMERATION("MultiProfile.SigninUserUIPath",
+                            action,
+                            NUM_SIGNIN_USER_ACTIONS);
+}
+
+}  // namespace ash