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

chrome/browser/page_load_metrics/observers/css_scanning_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/css_scanning_page_load_metrics_observer.h"
 
 #include "chrome/browser/page_load_metrics/page_load_metrics_util.h"
 #include "third_party/WebKit/public/platform/WebLoadingBehaviorFlag.h"
 
 CssScanningMetricsObserver::CssScanningMetricsObserver() {}
@@ skipping 12 matching lines @@
 page_load_metrics::PageLoadMetricsObserver::ObservePolicy
 CssScanningMetricsObserver::OnStart(
     content::NavigationHandle* navigation_handle,
     const GURL& currently_committed_url,
     bool started_in_foreground) {
   return started_in_foreground ? CONTINUE_OBSERVING : STOP_OBSERVING;
 }
 
 page_load_metrics::PageLoadMetricsObserver::ObservePolicy
 CssScanningMetricsObserver::OnHidden(
-    const page_load_metrics::PageLoadTiming&,
+    const page_load_metrics::mojom::PageLoadTiming&,
     const page_load_metrics::PageLoadExtraInfo&) {
   return STOP_OBSERVING;
 }
 
 void CssScanningMetricsObserver::OnFirstContentfulPaintInPage(
-    const page_load_metrics::PageLoadTiming& timing,
+    const page_load_metrics::mojom::PageLoadTiming& timing,
     const page_load_metrics::PageLoadExtraInfo& info) {
   if (!css_preload_found_)
     return;
 
   PAGE_LOAD_HISTOGRAM(
       "PageLoad.Clients.CssScanner.PaintTiming."
       "ParseStartToFirstContentfulPaint",
-      timing.paint_timing.first_contentful_paint.value() -
-          timing.parse_timing.parse_start.value());
+      timing.paint_timing->first_contentful_paint.value() -
+          timing.parse_timing->parse_start.value());
 }
 
 void CssScanningMetricsObserver::OnFirstMeaningfulPaintInMainFrameDocument(
-    const page_load_metrics::PageLoadTiming& timing,
+    const page_load_metrics::mojom::PageLoadTiming& timing,
     const page_load_metrics::PageLoadExtraInfo& info) {
   if (!css_preload_found_)
     return;
 
   PAGE_LOAD_HISTOGRAM(
       "PageLoad.Clients.CssScanner.Experimental.PaintTiming."
       "ParseStartToFirstMeaningfulPaint",
-      timing.paint_timing.first_meaningful_paint.value() -
-          timing.parse_timing.parse_start.value());
+      timing.paint_timing->first_meaningful_paint.value() -
+          timing.parse_timing->parse_start.value());
 }