Support needed to measure user and service traffic in Chrome.

components/data_use_measurement/content/data_use_user_data.cc

+// 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 "components/data_use_measurement/content/data_use_user_data.h"
+
+namespace data_use_measurement {
+DataUseUserData::DataUseUserData(ServiceType service_type)
+    : service_type_(service_type) {}
+
+DataUseUserData::~DataUseUserData() {}
+
+// static
+const void* DataUseUserData::kUserDataKey =
+    static_cast<const void*>(&DataUseUserData::kUserDataKey);
+
+// Helper function to create DataUseUserData.
+base::SupportsUserData::Data* CreateDataUseUserData(
+    DataUseUserData::ServiceType service_type) {
+  return new DataUseUserData(service_type);
+}
+
+const char* ReturnServiceName(DataUseUserData::ServiceType service_type) {
+  switch (service_type) {
+    case DataUseUserData::SUGGESTIONS:
+      return "Suggestions";
+    default:
+      break;

[sclittle, 2015/08/24 23:59:34]

nit: Just put the NOTREACHED here under "default".

[amohammadkhan, 2015/08/25 00:12:07]

Done.

+  }
+  NOTREACHED() << "Not known servie type in DataUseUserData";

[sclittle, 2015/08/24 23:59:34]

nit: spelling "servie"

[amohammadkhan, 2015/08/25 00:12:07]

Done.

+  return "INVALID";
+}
+
+}  // data_use_measurement namespace