dom-ui options: record user metrics for pref changes....

chrome/browser/resources/options/preferences.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.
 
 cr.define('options', function() {
 
   /////////////////////////////////////////////////////////////////////////////
   // Preferences class:
 
   /**
@@ skipping 23 matching lines @@
       }
     }
     return cur;
   };
 
   /**
    * Sets value of a boolean preference.
    * and signals its changed value.
    * @param {string} name Preference name.
    * @param {boolean} value New preference value.
+   * @param {string} metric User metrics identifier.
    */
-  Preferences.setBooleanPref = function (name, value) {
-    chrome.send('setBooleanPref', [name, value ? 'true' : 'false']);
+  Preferences.setBooleanPref = function (name, value, metric) {
+    var arguments = [name, value ? 'true' : 'false'];
+    if (metric != undefined) arguments.push(metric);
+    chrome.send('setBooleanPref', arguments);
   };
 
   /**
    * Sets value of an integer preference.
    * and signals its changed value.
    * @param {string} name Preference name.
    * @param {number} value New preference value.
+   * @param {string} metric User metrics identifier.
    */
-  Preferences.setIntegerPref = function(name, value) {
-    chrome.send('setIntegerPref', [name, String(value)]);
+  Preferences.setIntegerPref = function(name, value, metric) {
+    var arguments = [name, String(value)];
+    if (metric != undefined) arguments.push(metric);
+    chrome.send('setIntegerPref', arguments);
   };
 
   /**
    * Sets value of a string preference.
    * and signals its changed value.
    * @param {string} name Preference name.
    * @param {string} value New preference value.
+   * @param {string} metric User metrics identifier.
    */
-  Preferences.setStringPref = function(name, value) {
-    chrome.send('setStringPref', [name, value]);
+  Preferences.setStringPref = function(name, value, metric) {
+    var arguments = [name, value];
+    if (metric != undefined) arguments.push(metric);
+    chrome.send('setStringPref', arguments);
   };
 
   /**
    * Sets value of a JSON preference.
    * and signals its changed value.
    * @param {string} name Preference name.
    * @param {string} value New preference value.
+   * @param {string} metric User metrics identifier.
    */
-  Preferences.setObjectPref = function(name, value) {
-    chrome.send('setObjectPref', [name, JSON.stringify(value)]);
+  Preferences.setObjectPref = function(name, value, metric) {
+    var arguments = [name, JSON.stringify(value)];
+    if (metric != undefined) arguments.push(metric);
+    chrome.send('setObjectPref', arguments);
   };
 
   Preferences.prototype = {
     __proto__: cr.EventTarget.prototype,
 
     // Map of registered preferences.
     registeredPreferences_: {},
 
     /**
      * Adds an event listener to the target.
@@ skipping 61 matching lines @@
     Preferences.getInstance().dispatchEvent(event);
   };
 
   // Export
   return {
     Preferences: Preferences
   };
 
 });