Record data use of favicon

components/data_use_measurement/core/url_request_classifier.h

Index: components/data_use_measurement/core/url_request_classifier.h
diff --git a/components/data_use_measurement/core/url_request_classifier.h b/components/data_use_measurement/core/url_request_classifier.h
index 27b3d72515fa94ec6d2fea93a444df6e5b85105e..d8239b3f26bdbe8bed394ec78f7efce2d2309628 100644
--- a/components/data_use_measurement/core/url_request_classifier.h
+++ b/components/data_use_measurement/core/url_request_classifier.h
@@ -34,6 +34,9 @@ class URLRequestClassifier {
   // Records the page transition histograms.
   virtual void RecordPageTransitionUMA(uint64_t page_transition,
                                        int64_t received_bytes) const = 0;
+
+  // Returns true if |request| is fetching a favicon.
+  virtual bool IsFavIconRequest(const net::URLRequest& request) const = 0;
 };
 
 }  // namespace data_use_measurement