Deprecate NavigationToFirstContentfulPaint.UserGesture reload variant

chrome/browser/page_load_metrics/observers/reload_page_load_metrics_observer.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_RELOAD_PAGE_LOAD_METRICS_OBSERVER_H_
 #define CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_RELOAD_PAGE_LOAD_METRICS_OBSERVER_H_
 
 #include "base/macros.h"
 #include "components/page_load_metrics/browser/page_load_metrics_observer.h"
 
 namespace chrome {
 
 // An observer class to report metrics on pages those loading were initiated
 // by one of reload operations including hitting enter in the omnibox.
 // This ignore JavaScript-initiated loadings by location.reload() or
-// history.go(0).
+// history.go(0), and loadings triggered by <meta http-equiv="refresh">.
 class ReloadPageLoadMetricsObserver
     : public page_load_metrics::PageLoadMetricsObserver {
  public:
   ReloadPageLoadMetricsObserver();
 
   // page_load_metrics::PageLoadMetricsObserver implementation:
   void OnCommit(content::NavigationHandle* navigation_handle) override;
   void OnFirstContentfulPaint(
       const page_load_metrics::PageLoadTiming& timing,
       const page_load_metrics::PageLoadExtraInfo& extra_info) override;
 
  private:
   bool page_transition_was_reload_;
-  bool initiated_by_user_gesture_;
 
   DISALLOW_COPY_AND_ASSIGN(ReloadPageLoadMetricsObserver);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_RELOAD_PAGE_LOAD_METRICS_OBSERVER_H_