Record the tab state during data use

chrome/browser/data_use_measurement/chrome_data_use_ascriber.h

Index: chrome/browser/data_use_measurement/chrome_data_use_ascriber.h
diff --git a/chrome/browser/data_use_measurement/chrome_data_use_ascriber.h b/chrome/browser/data_use_measurement/chrome_data_use_ascriber.h
index a05d8a8b57a2dec762ce3b0f4e5cadc14d83c61e..565bd73a1c29b263b3b297dbce0841893d26bea6 100644
--- a/chrome/browser/data_use_measurement/chrome_data_use_ascriber.h
+++ b/chrome/browser/data_use_measurement/chrome_data_use_ascriber.h
@@ -57,6 +57,8 @@ class ChromeDataUseAscriber : public DataUseAscriber {
   // DataUseAscriber implementation:
   ChromeDataUseRecorder* GetDataUseRecorder(net::URLRequest* request,
                                             bool can_create_new) override;
+  const DataUseRecorder* GetDataUseRecorderIfExists(
+      const net::URLRequest* request) const override;
   void OnUrlRequestDestroyed(net::URLRequest* request) override;
   std::unique_ptr<URLRequestClassifier> CreateURLRequestClassifier()
       const override;