Propagate network delegate events to ChromeDataUseAscriber.

components/data_use_measurement/core/data_use_ascriber.cc

+// Copyright 2016 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_ascriber.h"
+
+namespace data_use_measurement {
+
+void DataUseAscriber::OnBeforeUrlRequest(net::URLRequest* request) {}
+
+void DataUseAscriber::OnBeforeRedirect(net::URLRequest* request,
+                                       const GURL& new_location) {}
+
+void DataUseAscriber::OnNetworkBytesSent(net::URLRequest* request,
+                                         int64_t bytes_sent) {}
+
+void DataUseAscriber::OnNetworkBytesReceived(net::URLRequest* request,
+                                             int64_t bytes_received) {}
+
+void DataUseAscriber::OnUrlRequestCompleted(net::URLRequest* request,
+                                            bool started) {}
+
+}  // namespace data_use_measurement