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

chrome/browser/page_load_metrics/observers/prerender_page_load_metrics_observer.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/page_load_metrics/observers/prerender_page_load_metrics_observer.h"
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_manager_factory.h"
@@ skipping 44 matching lines @@
     content::NavigationHandle* navigation_handle) {
   const net::HttpResponseHeaders* response_headers =
       navigation_handle->GetResponseHeaders();
 
   is_no_store_ = response_headers &&
                  response_headers->HasHeaderValue("cache-control", "no-store");
   return CONTINUE_OBSERVING;
 }
 
 void PrerenderPageLoadMetricsObserver::OnFirstContentfulPaintInPage(
-    const page_load_metrics::PageLoadTiming& timing,
+    const page_load_metrics::mojom::PageLoadTiming& timing,
     const page_load_metrics::PageLoadExtraInfo& extra_info) {
   DCHECK(!start_ticks_.is_null());
   prerender_manager_->RecordPrerenderFirstContentfulPaint(
       extra_info.start_url, web_contents_, is_no_store_, was_hidden_,
-      start_ticks_ + *timing.paint_timing.first_contentful_paint);
+      start_ticks_ + *timing.paint_timing->first_contentful_paint);
 }
 
 page_load_metrics::PageLoadMetricsObserver::ObservePolicy
 PrerenderPageLoadMetricsObserver::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;
 }
 
 void PrerenderPageLoadMetricsObserver::SetNavigationStartTicksForTesting(
     base::TimeTicks ticks) {
   start_ticks_ = ticks;
 }