Record the tab state during data use

chrome/browser/data_use_measurement/chrome_data_use_ascriber.h

 // 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.
 
 #ifndef CHROME_BROWSER_DATA_USE_MEASUREMENT_CHROME_DATA_USE_ASCRIBER_H_
 #define CHROME_BROWSER_DATA_USE_MEASUREMENT_CHROME_DATA_USE_ASCRIBER_H_
 
 #include <list>
 #include <memory>
 #include <string>
@@ skipping 37 matching lines @@
 //
 // This class lives entirely on the IO thread. It maintains a copy of frame and
 // navigation information on the IO thread.
 class ChromeDataUseAscriber : public DataUseAscriber {
  public:
   ChromeDataUseAscriber();
 
   ~ChromeDataUseAscriber() override;
 
   // DataUseAscriber implementation:
-  ChromeDataUseRecorder* GetDataUseRecorder(net::URLRequest* request,
-                                            bool can_create_new) override;
+  ChromeDataUseRecorder* GetOrCreateDataUseRecorder(
+      net::URLRequest* request) override;
+  ChromeDataUseRecorder* GetDataUseRecorder(
+      const net::URLRequest& request) override;
   void OnUrlRequestDestroyed(net::URLRequest* request) override;
   std::unique_ptr<URLRequestClassifier> CreateURLRequestClassifier()
       const override;
 
   // Called when a render frame host is created. When the render frame is a main
   // frame, |main_render_process_id| and |main_render_frame_id| should be -1.
   void RenderFrameCreated(int render_process_id,
                           int render_frame_id,
                           int main_render_process_id,
                           int main_render_frame_id);
@@ skipping 54 matching lines @@
     ~DataUseRecorderEntryAsUserData() override;
 
     DataUseRecorderEntry recorder_entry() { return entry_; }
 
     static const void* kUserDataKey;
 
    private:
     DataUseRecorderEntry entry_;
   };
 
-  DataUseRecorderEntry GetDataUseRecorderEntry(net::URLRequest* request,
-                                               bool can_create_new);
+  DataUseRecorderEntry GetOrCreateDataUseRecorderEntry(
+      net::URLRequest* request);
 
   void OnDataUseCompleted(DataUseRecorderEntry entry);
 
   DataUseRecorderEntry CreateNewDataUseRecorder(net::URLRequest* request);
 
   bool IsRecorderInPendingNavigationMap(net::URLRequest* request);
 
   bool IsRecorderInRenderFrameMap(net::URLRequest* request);
 
   // Owner for all instances of DataUseRecorder. An instance is kept in this
@@ skipping 22 matching lines @@
 
   // Contains the mainframe IDs that are currently visible.
   base::hash_set<RenderFrameHostID> visible_main_render_frames_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeDataUseAscriber);
 };
 
 }  // namespace data_use_measurement
 
 #endif  // CHROME_BROWSER_DATA_USE_MEASUREMENT_CHROME_DATA_USE_ASCRIBER_H_