Move data use measurement to DataUseNetworkDelegate

components/data_use_measurement/content/data_use_measurement.h

Index: components/data_use_measurement/content/data_use_measurement.h
diff --git a/components/data_use_measurement/content/data_use_measurement.h b/components/data_use_measurement/content/data_use_measurement.h
deleted file mode 100644
index 777a50a3623196de1020e73a26db14d0e04d8f5a..0000000000000000000000000000000000000000
--- a/components/data_use_measurement/content/data_use_measurement.h
+++ /dev/null
@@ -1,167 +0,0 @@
-// 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_CONTENT_DATA_USE_MEASUREMENT_H_
-#define COMPONENTS_DATA_USE_MEASUREMENT_CONTENT_DATA_USE_MEASUREMENT_H_
-
-#include <stdint.h>
-
-#include <memory>
-#include <string>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/time/time.h"
-#include "build/build_config.h"
-#include "components/data_use_measurement/core/data_use_user_data.h"
-#include "components/metrics/data_use_tracker.h"
-
-#if defined(OS_ANDROID)
-#include "base/android/application_status_listener.h"
-#endif
-
-class GURL;
-
-namespace net {
-class URLRequest;
-}
-
-namespace data_use_measurement {
-
-// Records the data use of user traffic and various services in UMA histograms.
-// The UMA is broken down by network technology used (Wi-Fi vs cellular). On
-// Android, the UMA is further broken down by whether the application was in the
-// background or foreground during the request.
-// TODO(amohammadkhan): Complete the layered architecture.
-// http://crbug.com/527460
-class DataUseMeasurement {
- public:
-  explicit DataUseMeasurement(
-      const metrics::UpdateUsagePrefCallbackType& metrics_data_use_forwarder);
-  ~DataUseMeasurement();
-
-  // Called before a request is sent.
-  void OnBeforeURLRequest(net::URLRequest* request);
-
-  // Called right after a redirect response code was received for |request|.
-  void OnBeforeRedirect(const net::URLRequest& request,
-                        const GURL& new_location);
-
-  // Called when data is received or sent on the network, respectively.
-  void OnNetworkBytesReceived(const net::URLRequest& request,
-                              int64_t bytes_received);
-  void OnNetworkBytesSent(const net::URLRequest& request, int64_t bytes_sent);
-
-  // Indicates that |request| has been completed or failed.
-  void OnCompleted(const net::URLRequest& request, bool started);
-
-  // Returns true if the URLRequest |request| is initiated by user traffic.
-  static bool IsUserInitiatedRequest(const net::URLRequest& request);
-
-#if defined(OS_ANDROID)
-  // This function should just be used for testing purposes. A change in
-  // application state can be simulated by calling this function.
-  void OnApplicationStateChangeForTesting(
-      base::android::ApplicationState application_state);
-#endif
-
- private:
-  friend class DataUseMeasurementTest;
-  FRIEND_TEST_ALL_PREFIXES(DataUseMeasurementTest,
-                           TimeOfBackgroundDownstreamBytes);
-
-  // Specifies that data is received or sent, respectively.
-  enum TrafficDirection { DOWNSTREAM, UPSTREAM };
-
-  // Returns the current application state (Foreground or Background). It always
-  // returns Foreground if Chrome is not running on Android.
-  DataUseUserData::AppState CurrentAppState() const;
-
-  // Makes the full name of the histogram. It is made from |prefix| and suffix
-  // which is made based on network and application status. suffix is a string
-  // representing whether the data use was on the send ("Upstream") or receive
-  // ("Downstream") path, whether the app was in the "Foreground" or
-  // "Background", and whether a "Cellular" or "WiFi" network was use. For
-  // example, "Prefix.Upstream.Foreground.Cellular" is a possible output.
-  // |app_state| indicates the app state which can be foreground, background, or
-  // unknown.
-  std::string GetHistogramName(const char* prefix,
-                               TrafficDirection dir,
-                               DataUseUserData::AppState app_state,
-                               bool is_connection_cellular) const;
-
-#if defined(OS_ANDROID)
-  // Called whenever the application transitions from foreground to background
-  // and vice versa.
-  void OnApplicationStateChange(
-      base::android::ApplicationState application_state);
-
-  // Records the count of bytes received and sent by Chrome on the network as
-  // reported by the operating system.
-  void MaybeRecordNetworkBytesOS();
-#endif
-
-  // Records the data use of the |request|, thus |request| must be non-null.
-  // |dir| is the direction (which is upstream or downstream) and |bytes| is the
-  // number of bytes in the direction.
-  void ReportDataUseUMA(const net::URLRequest& request,
-                        TrafficDirection dir,
-                        int64_t bytes);
-
-  // Updates the data use of the |request|, thus |request| must be non-null.
-  void UpdateDataUsePrefs(const net::URLRequest& request) const;
-
-  // A helper function used to record data use of services. It gets the size of
-  // exchanged message, its direction (which is upstream or downstream) and
-  // reports to two histogram groups. DataUse.MessageSize.ServiceName and
-  // DataUse.Services.{Dimensions}. In the second one, services are buckets.
-  // |app_state| indicates the app state which can be foreground, background, or
-  // unknown.
-  void ReportDataUsageServices(
-      data_use_measurement::DataUseUserData::ServiceName service,
-      TrafficDirection dir,
-      DataUseUserData::AppState app_state,
-      bool is_connection_cellular,
-      int64_t message_size) const;
-
-  // Callback for updating data use prefs.
-  // TODO(rajendrant): If a similar mechanism would need be used for components
-  // other than metrics, then the better approach would be to refactor this
-  // class to support registering arbitrary observers. crbug.com/601185
-  metrics::UpdateUsagePrefCallbackType metrics_data_use_forwarder_;
-
-#if defined(OS_ANDROID)
-  // Application listener store the last known state of the application in this
-  // field.
-  base::android::ApplicationState app_state_;
-
-  // ApplicationStatusListener used to monitor whether the application is in the
-  // foreground or in the background. It is owned by DataUseMeasurement.
-  std::unique_ptr<base::android::ApplicationStatusListener> app_listener_;
-
-  // Number of bytes received and sent by Chromium as reported by the operating
-  // system when it was last queried for traffic statistics. Set to 0 if the
-  // operating system was never queried.
-  int64_t rx_bytes_os_;
-  int64_t tx_bytes_os_;
-
-  // Number of bytes received and sent by Chromium as reported by the network
-  // delegate since the operating system was last queried for traffic
-  // statistics.
-  int64_t bytes_transferred_since_last_traffic_stats_query_;
-
-  // The time at which Chromium app state changed to background. Can be null if
-  // app is not in background.
-  base::TimeTicks last_app_background_time_;
-
-  // True if app is in background and first network read has not yet happened.
-  bool no_reads_since_background_;
-#endif
-
-  DISALLOW_COPY_AND_ASSIGN(DataUseMeasurement);
-};
-
-}  // namespace data_use_measurement
-
-#endif  // COMPONENTS_DATA_USE_MEASUREMENT_CONTENT_DATA_USE_MEASUREMENT_H_