Add detailed performance histograms to Files.app. (Abandoned)

chrome/browser/resources/file_manager/js/directory_model.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.
 
 'use strict';
 
 // If directory files changes too often, don't rescan directory more than once
 // per specified interval
 var SIMULTANEOUS_RESCAN_INTERVAL = 1000;
 // Used for operations that require almost instant rescan.
@@ skipping 1157 matching lines @@
   this.fileListSelection_.selectedIndex = index;
 };
 
 /**
  * Updates the roots list.
  *
  * @param {function()=} opt_callback Completion callback.
  * @private
  */
 DirectoryModel.prototype.updateRoots_ = function(opt_callback) {
-  metrics.startInterval('Load.Roots');
+  metrics.startInterval('UpdateRootsTime');
   DirectoryModelUtil.resolveRoots(
       this.root_, this.driveEnabled_,
       function(rootEntries) {
-        metrics.recordInterval('Load.Roots');
+        metrics.recordInterval('UpdateRootsTime');
 
         var rootsList = this.rootsList_;
         rootsList.splice.apply(
             rootsList, [0, rootsList.length].concat(rootEntries));
         if (opt_callback)
           opt_callback();
       }.bind(this));
 };
 
 /**
@@ skipping 243 matching lines @@
   if (this.onSearchCompleted_) {
     this.removeEventListener('scan-completed', this.onSearchCompleted_);
     this.onSearchCompleted_ = null;
   }
 
   if (this.onClearSearch_) {
     this.onClearSearch_();
     this.onClearSearch_ = null;
   }
 };