Record data use of user traffic by different core page transition types

components/data_use_measurement/core/data_use_measurement.h

 // 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>
@@ skipping 117 matching lines @@
       TrafficDirection dir,
       DataUseUserData::AppState app_state,
       bool is_connection_cellular,
       int64_t message_size) const;
 
   // Records data use histograms split on TrafficDirection, AppState and
   // TabState.
   void RecordTabStateHistogram(TrafficDirection dir,
                                DataUseUserData::AppState app_state,
                                bool is_tab_visible,
-                               int64_t bytes);
+                               int64_t bytes) const;
+
+  // Records data use histograms split on page tranition.
+  void RecordPageTransitionUMA(const net::URLRequest& request) const;
 
   // Classifier for identifying if an URL request is user initiated.
   std::unique_ptr<URLRequestClassifier> url_request_classifier_;
 
   // 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_;
 
@@ skipping 27 matching lines @@
   // 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_