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

chrome/browser/page_load_metrics/page_load_metrics_observer.h

Index: chrome/browser/page_load_metrics/page_load_metrics_observer.h
diff --git a/chrome/browser/page_load_metrics/page_load_metrics_observer.h b/chrome/browser/page_load_metrics/page_load_metrics_observer.h
index c84787a443019d30ad4dcad76c606d1878f092f1..eed3ce828c9ffa936addffb4bf565147e571abe8 100644
--- a/chrome/browser/page_load_metrics/page_load_metrics_observer.h
+++ b/chrome/browser/page_load_metrics/page_load_metrics_observer.h
@@ -122,8 +122,8 @@ struct PageLoadExtraInfo {
       PageEndReason page_end_reason,
       UserInitiatedInfo page_end_user_initiated_info,
       const base::Optional<base::TimeDelta>& page_end_time,
-      const PageLoadMetadata& main_frame_metadata,
-      const PageLoadMetadata& child_frame_metadata);
+      const mojom::PageLoadMetadata& main_frame_metadata,
+      const mojom::PageLoadMetadata& child_frame_metadata);
 
   // Simplified version of the constructor, intended for use in tests.
   static PageLoadExtraInfo CreateForTesting(const GURL& url,
@@ -192,10 +192,10 @@ struct PageLoadExtraInfo {
 
   // Extra information supplied to the page load metrics system from the
   // renderer for the main frame.
-  const PageLoadMetadata main_frame_metadata;
+  const mojom::PageLoadMetadata main_frame_metadata;
 
   // PageLoadMetadata for child frames of the current page load.
-  const PageLoadMetadata child_frame_metadata;
+  const mojom::PageLoadMetadata child_frame_metadata;
 };
 
 // Container for various information about a completed request within a page