Add UMA metrics to Photo Editor

chrome/browser/resources/file_manager/js/main.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.
 
 /**
  * Global fileManager reference useful for poking at from the console.
  */
 var fileManager;
 
 /**
  * Kick off the file manager dialog.
  *
  * Called by main.html after the dom has been parsed.
  */
 function init() {
   FileManager.initStrings(function () {
     metrics.startInterval('Load.Construct');
     fileManager = new FileManager(document.body);
-    metrics.recordTime('Load.Construct');
+    metrics.recordInterval('Load.Construct');
     // We're ready to run.  Tests can monitor for this state with
     // ExtensionTestMessageListener listener("ready");
     // ASSERT_TRUE(listener.WaitUntilSatisfied());
     chrome.test.sendMessage('ready');
   });
 }