Add a timeline view to about:net-internals.

chrome/browser/resources/net_internals/dns_view.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.
 
 /**
  * This view displays information on the host resolver:
  *
  *   - Shows the default address family.
  *   - Has a button to enable IPv6, if it is disabled.
  *   - Shows the current host cache contents.
@@ skipping 82 matching lines @@
       $(DnsView.CAPACITY_SPAN_ID).innerText = hostResolverCache.capacity;
       $(DnsView.TTL_SUCCESS_SPAN_ID).innerText =
           hostResolverCache.ttl_success_ms;
       $(DnsView.TTL_FAILURE_SPAN_ID).innerText =
           hostResolverCache.ttl_failure_ms;
 
       var expiredEntries = 0;
       // Date the cache was logged.  This will be either now, when actively
       // logging data, or the date the log dump was created.
       var logDate;
-      if (MainView.getInstance().isViewingLoadedLog()) {
+      if (MainView.isViewingLoadedLog()) {
         if (typeof ClientInfo.numericDate == 'number') {
           logDate = new Date(ClientInfo.numericDate);
         } else {
           // This is to prevent displaying entries as expired when loading
           // old logs.
           // TODO(mmenke):  Remove when Chrome 17 hits stable.
           logDate = new Date(0);
         }
       } else {
         logDate = new Date();
@@ skipping 40 matching lines @@
 
       $(DnsView.ACTIVE_SPAN_ID).innerText =
           hostResolverCache.entries.length - expiredEntries;
       $(DnsView.EXPIRED_SPAN_ID).innerText = expiredEntries;
       return true;
     }
   };
 
   return DnsView;
 })();