Add metric with time between background tab being foregrounded and the first paint

chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc

Index: chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc
diff --git a/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc b/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc
index d0a5e9812159a4b896bda66228d92a55255c6753..2a1c812d54589f2288f35f831d9645f328ac0565 100644
--- a/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc
+++ b/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc
@@ -63,44 +63,46 @@ void FromGWSPageLoadMetricsObserver::OnCommit(
 void FromGWSPageLoadMetricsObserver::OnComplete(
     const page_load_metrics::PageLoadTiming& timing,
     const page_load_metrics::PageLoadExtraInfo& extra_info) {
-  using page_load_metrics::EventOccurredInForeground;
+  using page_load_metrics::StartInForegroundEventInForeground;
 
   if (!navigation_from_gws_)
     return;
 
-  if (EventOccurredInForeground(timing.dom_content_loaded_event_start,
+  if (StartInForegroundEventInForeground(timing.dom_content_loaded_event_start,
                                 extra_info)) {
     PAGE_LOAD_HISTOGRAM(
         "PageLoad.Clients.FromGWS.Timing2."
         "NavigationToDOMContentLoadedEventFired",
         timing.dom_content_loaded_event_start);
   }
-  if (EventOccurredInForeground(timing.load_event_start, extra_info)) {
+  if (StartInForegroundEventInForeground(timing.load_event_start, extra_info)) {
     PAGE_LOAD_HISTOGRAM(
         "PageLoad.Clients.FromGWS.Timing2.NavigationToLoadEventFired",
         timing.load_event_start);
   }
-  if (EventOccurredInForeground(timing.first_layout, extra_info)) {
+  if (StartInForegroundEventInForeground(timing.first_layout, extra_info)) {
     PAGE_LOAD_HISTOGRAM(
         "PageLoad.Clients.FromGWS.Timing2.NavigationToFirstLayout",
         timing.first_layout);
   }
-  if (EventOccurredInForeground(timing.first_text_paint, extra_info)) {
+  if (StartInForegroundEventInForeground(timing.first_text_paint, extra_info)) {
     PAGE_LOAD_HISTOGRAM(
         "PageLoad.Clients.FromGWS.Timing2.NavigationToFirstTextPaint",
         timing.first_text_paint);
   }
-  if (EventOccurredInForeground(timing.first_image_paint, extra_info)) {
+  if (StartInForegroundEventInForeground(timing.first_image_paint,
+                                         extra_info)) {
     PAGE_LOAD_HISTOGRAM(
         "PageLoad.Clients.FromGWS.Timing2.NavigationToFirstImagePaint",
         timing.first_image_paint);
   }
-  if (EventOccurredInForeground(timing.first_paint, extra_info)) {
+  if (StartInForegroundEventInForeground(timing.first_paint, extra_info)) {
     PAGE_LOAD_HISTOGRAM(
         "PageLoad.Clients.FromGWS.Timing2.NavigationToFirstPaint",
         timing.first_paint);
   }
-  if (EventOccurredInForeground(timing.first_contentful_paint, extra_info)) {
+  if (StartInForegroundEventInForeground(timing.first_contentful_paint,
+                                         extra_info)) {
     PAGE_LOAD_HISTOGRAM(
         "PageLoad.Clients.FromGWS.Timing2.NavigationToFirstContentfulPaint",
         timing.first_contentful_paint);