Support needed to measure user and service traffic in Chrome.

components/data_use_measurement/core/data_use_user_data.h

Index: components/data_use_measurement/core/data_use_user_data.h
diff --git a/components/data_use_measurement/core/data_use_user_data.h b/components/data_use_measurement/core/data_use_user_data.h
new file mode 100644
index 0000000000000000000000000000000000000000..c010f94c4e780f5f3c034de31024a55f92c91bc1
--- /dev/null
+++ b/components/data_use_measurement/core/data_use_user_data.h
@@ -0,0 +1,40 @@
+// 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.
+
+#ifndef COMPONENTS_DATA_USE_MEASUREMENT_CORE_DATA_USE_USER_DATA_H_
+#define COMPONENTS_DATA_USE_MEASUREMENT_CORE_DATA_USE_USER_DATA_H_
+
+#include "base/supports_user_data.h"
+
+namespace data_use_measurement {
+
+// Used to annotate URLRequests with the service name if the URLRequest is used
+// by a service.
+class DataUseUserData : public base::SupportsUserData::Data {
+ public:
+  // This enum should be synced with DataUseServices enum in histograms.xml.
+  // Please keep them synced after any updates.
+  enum ServiceType {
+    SUGGESTIONS,
+  };
+  explicit DataUseUserData(ServiceType service_type);
+  ~DataUseUserData() override;
+
+  ServiceType service_type() const { return service_type_; }
+
+  static const void* kUserDataKey;

[Alexei Svitkine (slow), 2015/08/31 17:26:31]

Add a comment about what this is.

[amohammadkhan, 2015/09/01 04:52:49]

Done.

+
+ private:
+  ServiceType service_type_;
+};

[Alexei Svitkine (slow), 2015/08/31 17:26:31]

DISALLOW_COPY_AND_ASSIGN()

[amohammadkhan, 2015/09/01 04:52:49]

Done.

+
+// Helper function to create DataUseUserData. The caller takes the ownership of
+// the returned object.
+base::SupportsUserData::Data* CreateDataUseUserData(
+    DataUseUserData::ServiceType service);
+
+const char* GetServiceName(DataUseUserData::ServiceType service);
+
+}  // data_use_measurement namespace
+#endif  // COMPONENTS_DATA_USE_MEASUREMENT_CORE_DATA_USE_USER_DATA_H_