Record data use of favicon

components/data_use_measurement/content/content_url_request_classifier.h

Index: components/data_use_measurement/content/content_url_request_classifier.h
diff --git a/components/data_use_measurement/content/content_url_request_classifier.h b/components/data_use_measurement/content/content_url_request_classifier.h
index 8b978fed77354f73b7a0787d78ec0916dd592f49..2d9aa3ed34cab19d1f30e250428891c3825565c5 100644
--- a/components/data_use_measurement/content/content_url_request_classifier.h
+++ b/components/data_use_measurement/content/content_url_request_classifier.h
@@ -23,6 +23,8 @@ class ContentURLRequestClassifier : public URLRequestClassifier {
   DataUseUserData::DataUseContentType GetContentType(
       const net::URLRequest& request,
       const net::HttpResponseHeaders& response_headers) const override;
+
+  bool IsFavIconRequest(const net::URLRequest& request) const override;
 };
 
 }  // namespace data_use_measurement