Add UMA for ServiceWorker FirstMeaningfulPaint

chrome/browser/page_load_metrics/observers/service_worker_page_load_metrics_observer.h

Index: chrome/browser/page_load_metrics/observers/service_worker_page_load_metrics_observer.h
diff --git a/chrome/browser/page_load_metrics/observers/service_worker_page_load_metrics_observer.h b/chrome/browser/page_load_metrics/observers/service_worker_page_load_metrics_observer.h
index 8e1b9f20cd04405b8b54fbb659af08a9cfb7fb68..b6b974d3a6278ea98267ae1122a85eedbaebfca1 100644
--- a/chrome/browser/page_load_metrics/observers/service_worker_page_load_metrics_observer.h
+++ b/chrome/browser/page_load_metrics/observers/service_worker_page_load_metrics_observer.h
@@ -16,14 +16,29 @@ extern const char kBackgroundHistogramServiceWorkerParseStart[];
 extern const char kHistogramServiceWorkerFirstContentfulPaint[];
 extern const char kBackgroundHistogramServiceWorkerFirstContentfulPaint[];
 extern const char kHistogramServiceWorkerParseStartToFirstContentfulPaint[];
+extern const char kHistogramServiceWorkerFirstMeaningfulPaint[];
+extern const char kHistogramServiceWorkerParseStartToFirstMeaningfulPaint[];
 extern const char kHistogramServiceWorkerDomContentLoaded[];
 extern const char kHistogramServiceWorkerLoad[];
+
 extern const char kHistogramServiceWorkerFirstContentfulPaintInbox[];
+extern const char kHistogramServiceWorkerFirstMeaningfulPaintInbox[];
+extern const char
+    kHistogramServiceWorkerParseStartToFirstMeaningfulPaintInbox[];
 extern const char
     kHistogramServiceWorkerParseStartToFirstContentfulPaintInbox[];
 extern const char kHistogramServiceWorkerDomContentLoadedInbox[];
 extern const char kHistogramServiceWorkerLoadInbox[];
 
+extern const char kHistogramServiceWorkerFirstContentfulPaintSearch[];
+extern const char kHistogramServiceWorkerFirstMeaningfulPaintSearch[];
+extern const char
+    kHistogramServiceWorkerParseStartToFirstMeaningfulPaintSearch[];
+extern const char
+    kHistogramServiceWorkerParseStartToFirstContentfulPaintSearch[];
+extern const char kHistogramServiceWorkerDomContentLoadedSearch[];
+extern const char kHistogramServiceWorkerLoadSearch[];
+
 }  // namespace internal
 
 class ServiceWorkerPageLoadMetricsObserver
@@ -37,6 +52,9 @@ class ServiceWorkerPageLoadMetricsObserver
   void OnFirstContentfulPaintInPage(
       const page_load_metrics::mojom::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
+  void OnFirstMeaningfulPaintInMainFrameDocument(
+      const page_load_metrics::mojom::PageLoadTiming& timing,
+      const page_load_metrics::PageLoadExtraInfo& info) override;
   void OnDomContentLoadedEventStart(
       const page_load_metrics::mojom::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;