Adds the ability to load JSON log files to about:net-internals.

chrome/browser/resources/net_internals/eventsview.js

 // Copyright (c) 2010 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.
 
 /**
  * EventsView displays a filtered list of all events sharing a source, and
  * a details pane for the selected sources.
  *
  *  +----------------------++----------------+
  *  |      filter box      ||                |
@@ skipping 457 matching lines @@
       entry.remove();
       delete this.sourceIdToEntryMap_[id];
       this.incrementPrefilterCount(-1);
     }
   }
 };
 
 /**
  * Called whenever all log events are deleted.
  */
-EventsView.prototype.onAllLogEntriesDeleted = function(offset) {
+EventsView.prototype.onAllLogEntriesDeleted = function() {
   this.initializeSourceList_();
 };
 
+/**
+ * Called when either a log file is loaded or when going back to actively
+ * logging events.  In either case, called after clearing the old entries,
+ * but before getting any new ones.
+ */
+EventsView.prototype.onSetIsViewingLogFile = function(isViewingLogFile) {
+  // Needed to sort new sourceless entries correctly.
+  this.maxReceivedSourceId_ = 0;
+};
+
 EventsView.prototype.incrementPrefilterCount = function(offset) {
   this.numPrefilter_ += offset;
   this.invalidateFilterCounter_();
 };
 
 EventsView.prototype.incrementPostfilterCount = function(offset) {
   this.numPostfilter_ += offset;
   this.invalidateFilterCounter_();
 };
 
@@ skipping 112 matching lines @@
                       EventsView.REPAINT_FILTER_COUNTER_TIMEOUT_MS);
   }
 };
 
 EventsView.prototype.repaintFilterCounter_ = function() {
   this.outstandingRepaintFilterCounter_ = false;
   this.filterCount_.innerHTML = '';
   addTextNode(this.filterCount_,
               this.numPostfilter_ + ' of ' + this.numPrefilter_);
 };