Report page load timing information for child frames.

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 da5467859faa298854b8db4bb1cd779c9c974837..ccae5a73afe4c22f7c53b9cc34d70b64e3be9b86 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
@@ -103,19 +103,19 @@ class CorePageLoadMetricsObserver
   void OnFirstLayout(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
-  void OnFirstPaint(
+  void OnFirstPaintInPage(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
-  void OnFirstTextPaint(
+  void OnFirstTextPaintInPage(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
-  void OnFirstImagePaint(
+  void OnFirstImagePaintInPage(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
-  void OnFirstContentfulPaint(
+  void OnFirstContentfulPaintInPage(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
-  void OnFirstMeaningfulPaint(
+  void OnFirstMeaningfulPaintInMainFrameDocument(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
   void OnParseStart(