[PageLoadMetrics] Record bytes usage per page

chrome/browser/page_load_metrics/page_load_metrics_observer.cc

Index: chrome/browser/page_load_metrics/page_load_metrics_observer.cc
diff --git a/chrome/browser/page_load_metrics/page_load_metrics_observer.cc b/chrome/browser/page_load_metrics/page_load_metrics_observer.cc
index cb27c0d8c4fffe7938f1780a871c501ff2774daa..0135bc688f910a8e842ba816dc971487659d57e0 100644
--- a/chrome/browser/page_load_metrics/page_load_metrics_observer.cc
+++ b/chrome/browser/page_load_metrics/page_load_metrics_observer.cc
@@ -18,6 +18,8 @@ PageLoadExtraInfo::PageLoadExtraInfo(
     const base::Optional<base::TimeDelta>& time_to_abort,
     int num_cache_requests,
     int num_network_requests,
+    int64_t cache_bytes,
+    int64_t network_bytes,
     const PageLoadMetadata& metadata)
     : first_background_time(first_background_time),
       first_foreground_time(first_foreground_time),
@@ -30,6 +32,8 @@ PageLoadExtraInfo::PageLoadExtraInfo(
       time_to_abort(time_to_abort),
       num_cache_requests(num_cache_requests),
       num_network_requests(num_network_requests),
+      cache_bytes(cache_bytes),
+      network_bytes(network_bytes),
       metadata(metadata) {}
 
 PageLoadExtraInfo::PageLoadExtraInfo(const PageLoadExtraInfo& other) = default;