Basic UkmService implementation

components/ukm/ukm_service_unittest.cc

+// Copyright 2017 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 "components/ukm/ukm_service.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <memory>
+#include <utility>

[Alexei Svitkine (slow), 2017/01/10 17:37:19]

I don't think all these includes should be needed with the current state of this
file...

[Steven Holte, 2017/01/10 22:52:45]

Done.

+
+#include "components/metrics/test_metrics_service_client.h"
+#include "components/prefs/testing_pref_service.h"
+#include "components/ukm/ukm_pref_names.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace ukm {
+
+TEST(UkmServiceTest, Construct) {
+  TestingPrefServiceSimple test_prefs;
+  metrics::TestMetricsServiceClient test_client;
+  UkmService service(&test_prefs, &test_client);
+}
+
+}  // namespace ukm