[Page Load Metrics] Add mojom file to page load metrics.

chrome/browser/page_load_metrics/observers/no_state_prefetch_page_load_metrics_observer.cc

Index: chrome/browser/page_load_metrics/observers/no_state_prefetch_page_load_metrics_observer.cc
diff --git a/chrome/browser/page_load_metrics/observers/no_state_prefetch_page_load_metrics_observer.cc b/chrome/browser/page_load_metrics/observers/no_state_prefetch_page_load_metrics_observer.cc
index 8da822e5d395257d0741261f3a831bd0c54da1fe..4bf5f26000e9607ac916f2c322021ab8f85fcf9c 100644
--- a/chrome/browser/page_load_metrics/observers/no_state_prefetch_page_load_metrics_observer.cc
+++ b/chrome/browser/page_load_metrics/observers/no_state_prefetch_page_load_metrics_observer.cc
@@ -44,17 +44,17 @@ NoStatePrefetchPageLoadMetricsObserver::OnCommit(
 }
 
 void NoStatePrefetchPageLoadMetricsObserver::OnFirstContentfulPaintInPage(
-    const page_load_metrics::PageLoadTiming& timing,
+    const page_load_metrics::mojom::PageLoadTiming& timing,
     const page_load_metrics::PageLoadExtraInfo& extra_info) {
-  DCHECK(timing.paint_timing.first_contentful_paint.has_value());
+  DCHECK(timing.paint_timing->first_contentful_paint.has_value());
   prerender_manager_->RecordNoStateFirstContentfulPaint(
       extra_info.start_url, is_no_store_, was_hidden_,
-      *timing.paint_timing.first_contentful_paint);
+      *timing.paint_timing->first_contentful_paint);
 }
 
 page_load_metrics::PageLoadMetricsObserver::ObservePolicy
 NoStatePrefetchPageLoadMetricsObserver::OnHidden(
-    const page_load_metrics::PageLoadTiming& timing,
+    const page_load_metrics::mojom::PageLoadTiming& timing,
     const page_load_metrics::PageLoadExtraInfo& extra_info) {
   was_hidden_ = true;
   return CONTINUE_OBSERVING;