PageLoadMetricsObservers observe individual page loads

chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.h

Index: chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.h
diff --git a/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.h b/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.h
index 58eebca22a8fb8b653b330b4a782f9ca3ff8dbc6..0465ede23619906d8eefeaae1f945b34c6a43681 100644
--- a/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.h
+++ b/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.h
@@ -11,14 +11,12 @@
 class FromGWSPageLoadMetricsObserver
     : public page_load_metrics::PageLoadMetricsObserver {
  public:
-  explicit FromGWSPageLoadMetricsObserver(
-      page_load_metrics::PageLoadMetricsObservable* metrics);
+  FromGWSPageLoadMetricsObserver();
   // page_load_metrics::PageLoadMetricsObserver implementation:
   void OnCommit(content::NavigationHandle* navigation_handle) override;
   void OnComplete(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
-  void OnPageLoadMetricsGoingAway() override;
 
  protected:
   // Called in tests.
@@ -27,7 +25,6 @@ class FromGWSPageLoadMetricsObserver
 
  private:
   bool navigation_from_gws_;
-  page_load_metrics::PageLoadMetricsObservable* const metrics_;
 
   DISALLOW_COPY_AND_ASSIGN(FromGWSPageLoadMetricsObserver);
 };