Record the data use by content type

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 4714a10872e52664d24741ff0d4e6e64be26407a..00dc4108054d5fd723980014da28554971206813 100644
--- a/components/data_use_measurement/core/url_request_classifier.h
+++ b/components/data_use_measurement/core/url_request_classifier.h
@@ -5,7 +5,10 @@
 #ifndef COMPONENTS_DATA_USE_MEASUREMENT_CORE_URL_REQUEST_CLASSIFIER_H_
 #define COMPONENTS_DATA_USE_MEASUREMENT_CORE_URL_REQUEST_CLASSIFIER_H_
 
+#include "components/data_use_measurement/core/data_use_user_data.h"
+
 namespace net {
+class HttpResponseHeaders;
 class URLRequest;
 }
 
@@ -18,6 +21,13 @@ class URLRequestClassifier {
 
   // Returns true if the URLRequest |request| is initiated by user traffic.
   virtual bool IsUserRequest(const net::URLRequest& request) const = 0;
+
+  // Returns the content type of the URL request |request| with response headers
+  // |response_headers|. |is_app_foreground| and |is_tab_visible| indicate the
+  // current app and tab visibility state.
+  virtual DataUseUserData::DataUseContentType GetContentType(
+      const net::URLRequest& request,
+      const net::HttpResponseHeaders& response_headers) const = 0;
 };
 
 }  // namespace data_use_measurement