Fix incorrect assert in PageLoadTracker.

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 692 matching lines @@
   // interpreted as the abort time for other provisional loads in the tab.
   // However, this only makes sense if the committed load started after the
   // aborted provisional loads started. Thus we ignore cases where the committed
   // load started before the aborted provisional load, as this would result in
   // recording a negative time-to-abort. The real issue here is that we have to
   // infer the cause of aborts. It would be better if the navigation code could
   // instead report the actual cause of an aborted navigation. See crbug/571647
   // 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;
   }
   page_end_reason_ = page_end_reason;
   page_end_time_ = timestamp;
   // A client redirect can never be user initiated. Due to the way Blink
   // implements user gesture tracking, where all events that occur within 1
   // second after a user interaction are considered to be triggered by user
   // activation (based on HTML spec:
   // https://html.spec.whatwg.org/multipage/interaction.html#triggered-by-user-activation),
   // these navs may sometimes be reported as user initiated by Blink. Thus, we
   // explicitly filter these types of aborts out when deciding if the abort was
   // user initiated.
   if (page_end_reason != END_CLIENT_REDIRECT)
     page_end_user_initiated_info_ = user_initiated_info;
 
   if (is_certainly_browser_timestamp) {
     ClampBrowserTimestampIfInterProcessTimeTickSkew(&page_end_time_);
   }
 }
 
 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