[refactor] Split up SourceTracker into SourceTracker + EventsTracker.

chrome/browser/resources/net_internals/export_view.js

 // Copyright (c) 2012 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 options for exporting the captured data.
  */
 var ExportView = (function() {
   'use strict';
 
@@ skipping 47 matching lines @@
 
   ExportView.prototype = {
     // Inherit the superclass's methods.
     __proto__: superClass.prototype,
 
     /**
      * Depending on the value of the checkbox, enables or disables stripping
      * cookies and passwords from log dumps and displayed events.
      */
     onSetSecurityStripping_: function(securityStrippingCheckbox) {
-      g_browser.sourceTracker.setSecurityStripping(
+      SourceTracker.getInstance().setSecurityStripping(
           securityStrippingCheckbox.checked);
     },
 
     /**
      * When loading a log dump, cache it for future export and continue showing
      * the ExportView.
      */
     onLoadLogFinish: function(polledData, tabData, logDump) {
       this.loadedLogDump_ = logDump;
       this.setUserComments_(logDump.userComments);
@@ skipping 44 matching lines @@
      */
     createLogDump_: function(callback) {
       // Get an explanation for the dump file (this is mandatory!)
       var userComments = this.getNonEmptyUserComments_();
       if (userComments == undefined) {
         return;
       }
 
       this.setSaveFileStatus('Preparing data...', true);
 
-      var securityStripping = g_browser.sourceTracker.getSecurityStripping();
+      var securityStripping =
+          SourceTracker.getInstance().getSecurityStripping();
 
       // If we have a cached log dump, update it synchronously.
       if (this.loadedLogDump_) {
         var dumpText = log_util.createUpdatedLogDump(userComments,
                                                      this.loadedLogDump_,
                                                      securityStripping);
         callback(dumpText);
         return;
       }
 
@@ skipping 41 matching lines @@
       blobBuilder.append(dumpText, 'native');
       var textBlob = blobBuilder.getBlob('octet/stream');
       this.lastBlobURL_ = window.webkitURL.createObjectURL(textBlob);
       this.downloadIframe_.src = this.lastBlobURL_;
       this.setSaveFileStatus('Dump successful', false);
     }
   };
 
   return ExportView;
 })();