Move tracked prefs into services/preferences/tracked.

services/preferences/public/cpp/tracked/configuration.h

Index: services/preferences/public/cpp/tracked/configuration.h
diff --git a/services/preferences/public/cpp/tracked/configuration.h b/services/preferences/public/cpp/tracked/configuration.h
new file mode 100644
index 0000000000000000000000000000000000000000..bbb0ebff4cac7d0cb94db7952039e1767d867070
--- /dev/null
+++ b/services/preferences/public/cpp/tracked/configuration.h
@@ -0,0 +1,37 @@
+// 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.
+
+#ifndef SERVICES_PREFERENCES_PUBLIC_CPP_TRACKED_CONFIGURATION_H_
+#define SERVICES_PREFERENCES_PUBLIC_CPP_TRACKED_CONFIGURATION_H_
+
+#include "services/preferences/public/interfaces/preferences_configuration.mojom.h"
+
+namespace prefs {
+
+struct TrackedPreferenceMetadata {
+  size_t reporting_id;
+  const char* name;
+  mojom::TrackedPreferenceMetadata::EnforcementLevel enforcement_level;
+  mojom::TrackedPreferenceMetadata::PrefTrackingStrategy strategy;
+  mojom::TrackedPreferenceMetadata::ValueType value_type;
+};
+
+mojom::TrackedPreferenceMetadataPtr ConstructTrackedMetadata(
+    const TrackedPreferenceMetadata& metadata);
+
+template <typename ConfigurationContainer>
+std::vector<mojom::TrackedPreferenceMetadataPtr> ConstructTrackedConfiguration(
+    const ConfigurationContainer& configuration) {
+  std::vector<mojom::TrackedPreferenceMetadataPtr> result;
+  for (auto metadata : configuration) {
+    result.push_back(ConstructTrackedMetadata(metadata));
+  }
+  return result;
+}
+
+std::vector<mojom::TrackedPreferenceMetadataPtr> CloneTrackedConfiguration(
+    const std::vector<mojom::TrackedPreferenceMetadataPtr>& configuration);
+
+}  // namespace prefs
+#endif  // SERVICES_PREFERENCES_PUBLIC_CPP_TRACKED_CONFIGURATION_H_