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..ce88d60993a81d43f81b787dfd4fc3dc47b9962a
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+++ b/components/data_use_measurement/core/data_use_user_data.cc
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+// 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"
+
+#include "base/strings/stringprintf.h"
+#include "net/url_request/url_fetcher.h"
+
+namespace data_use_measurement {
+
+DataUseUserData::DataUseUserData(ServiceName service_name)
+    : service_name_(service_name) {}
+
+DataUseUserData::~DataUseUserData() {}
+
+// static
+const void* DataUseUserData::kUserDataKey =
+    static_cast<const void*>(&DataUseUserData::kUserDataKey);
+
+// static
+base::SupportsUserData::Data* DataUseUserData::Create(
+    ServiceName service_name) {
+  return new DataUseUserData(service_name);
+}
+
+// static
+std::string DataUseUserData::GetServiceNameAsString(ServiceName service_name,
+                                                    const char* prefix) {
+  switch (service_name) {
+    case SUGGESTIONS:
+      return base::StringPrintf("%s%s", prefix, "Suggestions");
+    case NOT_TAGGED:
+      return base::StringPrintf("%s%s", prefix, "NotTagged");
+  }
+  return base::StringPrintf("%s%s", prefix, "INVALID");
+}
+
+// static
+void DataUseUserData::AttachToFetcher(net::URLFetcher* fetcher,
+                                      ServiceName service_name) {
+  fetcher->SetURLRequestUserData(kUserDataKey,
+                                 base::Bind(&Create, service_name));
+}
+
+}  // namespace data_use_measurement