Improve tracking of user initiated page loads.

chrome/browser/page_load_metrics/page_load_metrics_observer.h

Index: chrome/browser/page_load_metrics/page_load_metrics_observer.h
diff --git a/chrome/browser/page_load_metrics/page_load_metrics_observer.h b/chrome/browser/page_load_metrics/page_load_metrics_observer.h
index fd8c8ffb16affce1d782c637335698ae6a6430fd..2df853b476e72dcc14305f8016d6ed76d95b5b56 100644
--- a/chrome/browser/page_load_metrics/page_load_metrics_observer.h
+++ b/chrome/browser/page_load_metrics/page_load_metrics_observer.h
@@ -70,7 +70,7 @@ struct PageLoadExtraInfo {
       const base::Optional<base::TimeDelta>& first_background_time,
       const base::Optional<base::TimeDelta>& first_foreground_time,
       bool started_in_foreground,
-      bool user_gesture,
+      bool user_initiated,
       const GURL& committed_url,
       const GURL& start_url,
       UserAbortType abort_type,
@@ -95,7 +95,7 @@ struct PageLoadExtraInfo {
 
   // True if this is either a browser initiated navigation or the user_gesture
   // bit is true in the renderer.
-  const bool user_gesture;
+  const bool user_initiated;
 
   // Committed URL. If the page load did not commit, |committed_url| will be
   // empty.
@@ -108,6 +108,7 @@ struct PageLoadExtraInfo {
   // aborted, |abort_type| will be |ABORT_NONE|.
   const UserAbortType abort_type;
 
+  // Whether the page load that aborted this page load was user initiated.
   // TODO(csharrison): If more metadata for aborts is needed we should provide a
   // better abstraction. Note that this is an approximation.
   bool abort_user_initiated;