Fix incorrect assert in PageLoadTracker.

chrome/browser/page_load_metrics/page_load_tracker.cc

Index: chrome/browser/page_load_metrics/page_load_tracker.cc
diff --git a/chrome/browser/page_load_metrics/page_load_tracker.cc b/chrome/browser/page_load_metrics/page_load_tracker.cc
index 25c2883503484333a617d9ccfedb9182b6eb5e1a..dcfd451422b6d4803068ebd0c44afe1d575a3f48 100644
--- a/chrome/browser/page_load_metrics/page_load_tracker.cc
+++ b/chrome/browser/page_load_metrics/page_load_tracker.cc
@@ -710,7 +710,7 @@ void PageLoadTracker::UpdatePageEndInternal(
   // for details.
   if (timestamp < navigation_start_) {
     RecordInternalError(ERR_END_BEFORE_NAVIGATION_START);
-    page_end_reason_ = END_NONE;
+    page_end_reason_ = END_OTHER;
     page_end_time_ = base::TimeTicks();
     return;
   }