Support needed to measure user and service traffic in Chrome.

components/data_use_measurement/core/data_use_user_data.cc

Index: components/data_use_measurement/core/data_use_user_data.cc
diff --git a/components/data_use_measurement/core/data_use_user_data.cc b/components/data_use_measurement/core/data_use_user_data.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f65c12682aa174e4a43f7eb0076a956a8fadcdd4
--- /dev/null
+++ b/components/data_use_measurement/core/data_use_user_data.cc
@@ -0,0 +1,33 @@
+// 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/core/data_use_user_data.h"
+
+namespace data_use_measurement {

[sclittle, 2015/08/26 23:08:30]

nit: add blank line after

[amohammadkhan, 2015/08/29 01:00:59]

Done.

+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.

[sclittle, 2015/08/26 23:08:30]

Move this comment to the .h file.

[amohammadkhan, 2015/08/29 01:00:59]

Done.

+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:
+      NOTREACHED() << "Unknown service type in DataUseUserData";
+  }
+  return "INVALID";
+}
+
+}  // data_use_measurement namespace