FirstMeaningfulPaint UMA

chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer.h

Index: chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer.h
diff --git a/chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer.h b/chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer.h
index b33bc56863e80e98d66acc8ca3eb944307d07ceb..795510065aba457c0d1500455af7eaef50140e15 100644
--- a/chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer.h
+++ b/chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer.h
@@ -77,6 +77,9 @@ class CorePageLoadMetricsObserver
   void OnFirstContentfulPaint(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
+  void OnFirstMeaningfulPaint(
+      const page_load_metrics::PageLoadTiming& timing,
+      const page_load_metrics::PageLoadExtraInfo& extra_info) override;
   void OnParseStart(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
@@ -89,6 +92,8 @@ class CorePageLoadMetricsObserver
       const page_load_metrics::FailedProvisionalLoadInfo& failed_load_info,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
 
+  void OnUserInput(const blink::WebInputEvent& event) override;
+
  private:
   void RecordTimingHistograms(const page_load_metrics::PageLoadTiming& timing,
                               const page_load_metrics::PageLoadExtraInfo& info);
@@ -97,6 +102,9 @@ class CorePageLoadMetricsObserver
 
   ui::PageTransition transition_;
   bool initiated_by_user_gesture_;
+  bool had_first_paint_;
+  base::TimeTicks navigation_start_;
+  base::TimeTicks first_user_interaction_after_first_paint_;
 
   DISALLOW_COPY_AND_ASSIGN(CorePageLoadMetricsObserver);
 };