Record the data use by content type

components/data_use_measurement/core/data_use_user_data.cc

Index: components/data_use_measurement/core/data_use_user_data.cc
diff --git a/components/data_use_measurement/core/data_use_user_data.cc b/components/data_use_measurement/core/data_use_user_data.cc
index 6c9681661d08016ce4c5dd31a1ec98a937656772..ae86b2e3c593de508ffc193bf555c342f0a21f0b 100644
--- a/components/data_use_measurement/core/data_use_user_data.cc
+++ b/components/data_use_measurement/core/data_use_user_data.cc
@@ -29,7 +29,9 @@ DataUseUserData::AppState GetCurrentAppState() {
 }  // namespace
 
 DataUseUserData::DataUseUserData(ServiceName service_name, AppState app_state)
-    : service_name_(service_name), app_state_(app_state) {}
+    : service_name_(service_name),
+      app_state_(app_state),
+      content_type_(DataUseContentType::OTHER) {}
 
 DataUseUserData::~DataUseUserData() {}