Reland of: Profile_Metrics integration with Keystone

chrome/browser/profiles/profile_metrics_mac.mm

Index: chrome/browser/profiles/profile_metrics_mac.mm
diff --git a/chrome/browser/profiles/profile_metrics_mac.mm b/chrome/browser/profiles/profile_metrics_mac.mm
new file mode 100644
index 0000000000000000000000000000000000000000..8b128713d004b399ee2805443c5de829f824fd3f
--- /dev/null
+++ b/chrome/browser/profiles/profile_metrics_mac.mm
@@ -0,0 +1,18 @@
+// Copyright 2015 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/profiles/profile_metrics.h"
+
+#include "base/numerics/safe_conversions.h"
+#include "chrome/browser/mac/keystone_glue.h"
+
+void ProfileMetrics::UpdateReportedOSProfileStatistics(
+    size_t active, size_t signedin) {
+  if (base::IsValueInRangeForNumericType<uint32_t>(active) &&
+      base::IsValueInRangeForNumericType<uint32_t>(signedin)) {
+    [[KeystoneGlue defaultKeystoneGlue]
+        updateProfileCountsWithNumProfiles:active
+                       numSignedInProfiles:signedin];
+  }
+}