Add a timeline view to about:net-internals.

chrome/browser/resources/net_internals/source_entry.js

 // Copyright (c) 2011 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.
 
 var SourceEntry = (function() {
   'use strict';
 
   /**
    * A SourceEntry gathers all log entries with the same source.
    *
@@ skipping 180 matching lines @@
 
     isError: function() {
       return this.isError_;
     },
 
     /**
      * Returns time of last event if inactive.  Returns current time otherwise.
      */
     getEndTime: function() {
       if (!this.isInactive_) {
-        return (new Date()).getTime();
+        return timeutil.getCurrentTime();
       } else {
         var endTicks = this.entries_[this.entries_.length - 1].time;
         return timeutil.convertTimeTicksToDate(endTicks).getTime();
       }
     },
 
     /**
      * Returns the time between the first and last events with a matching
      * source ID.  If source is still active, uses the current time for the
      * last event.
      */
     getDuration: function() {
       var startTicks = this.entries_[0].time;
       var startTime = timeutil.convertTimeTicksToDate(startTicks).getTime();
       var endTime = this.getEndTime();
       return endTime - startTime;
     },
 
     printAsText: function() {
       return PrintSourceEntriesAsText(this.entries_);
     }
   };
 
   return SourceEntry;
 })();