Update both end time and end reason when we don't have an end time.

chrome/browser/page_load_metrics/page_load_tracker.cc

 // 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.
 
 #include "chrome/browser/page_load_metrics/page_load_tracker.h"
 
 #include <algorithm>
 #include <ostream>
 #include <string>
 #include <utility>
@@ skipping 304 matching lines @@
 
 PageLoadTracker::~PageLoadTracker() {
   if (app_entered_background_) {
     RecordAppBackgroundPageLoadCompleted(true);
   }
 
   if (did_stop_tracking_)
     return;
 
   if (page_end_time_.is_null()) {
+    // page_end_time_ can be unset in some cases, such as when a navigation is
+    // aborted by a navigation that started before it. In these cases, set the
+    // end time to the current time.
     RecordInternalError(ERR_NO_PAGE_LOAD_END_TIME);
-    page_end_time_ = base::TimeTicks::Now();
+    NotifyPageEnd(END_OTHER, UserInitiatedInfo::NotUserInitiated(),
+                  base::TimeTicks::Now(), true);
   }
 
   if (!did_commit_) {
     if (!failed_provisional_load_info_)
       RecordInternalError(ERR_NO_COMMIT_OR_FAILED_PROVISIONAL_LOAD);
 
     // Don't include any aborts that resulted in a new navigation, as the chain
     // length will be included in the aborter PageLoadTracker.
     if (page_end_reason_ != END_RELOAD &&
         page_end_reason_ != END_FORWARD_BACK &&
@@ skipping 396 matching lines @@
 }
 
 void PageLoadTracker::MediaStartedPlaying(
     const content::WebContentsObserver::MediaPlayerInfo& video_type,
     bool is_in_main_frame) {
   for (const auto& observer : observers_)
     observer->MediaStartedPlaying(video_type, is_in_main_frame);
 }
 
 }  // namespace page_load_metrics