MD Settings: Internet: Allow Shared Proxies

chrome/browser/resources/settings/controls/settings_boolean_control_behavior.js

 // Copyright 2016 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.
 
 /**
  * @fileoverview
  * A behavior to help controls that handle a boolean preference, such as
  * checkbox and toggle button.
  */
 
 /** @polymerBehavior SettingsBooleanControlBehavior */
 var SettingsBooleanControlBehaviorImpl = {
   properties: {
     /** Whether the control should represent the inverted value. */
     inverted: {
       type: Boolean,
       value: false,
     },
 
     /** Whether the control is checked. */
     checked: {
       type: Boolean,
       value: false,
       notify: true,
       observer: 'checkedChanged_',
-      reflectToAttribute: true
+      reflectToAttribute: true,
     },
 
     /** Disabled property for the element. */
     disabled: {
       type: Boolean,
       value: false,
       notify: true,
-      reflectToAttribute: true
+      reflectToAttribute: true,
+    },
+
+    /**
+     * If true, do not automatically set the preference value. This allows the
+     * container to confirm the change first then call either sendPrefChange
+     * or resetToPrefValue accordingly.
+     */
+    noSetPref: {
+      type: Boolean,
+      value: false,
     },
 
     /** The main label. */
     label: {
       type: String,
       value: '',
     },
 
     /** Additional (optional) sub-label. */
     subLabel: {
       type: String,
       value: '',
     },
   },
 
   observers: [
-    'prefValueChanged_(pref.value)'
+    'prefValueChanged_(pref.value)',
   ],
 
+  /** Reset the checked state to match the current pref value. */
+  resetToPrefValue: function() {
+    this.checked = this.getNewValue_(this.pref.value);
+  },
+
+  /** Update the pref to the current |checked| value. */
+  sendPrefChange: function() {
+    /** @type {boolean} */ var newValue = this.getNewValue_(this.checked);
+    // Ensure that newValue is the correct type for the pref type, either
+    // a boolean or a number.
+    if (this.pref.type == chrome.settingsPrivate.PrefType.NUMBER) {
+      this.set('pref.value', newValue ? 1 : 0);
+      return;
+    }
+    this.set('pref.value', newValue);
+  },
+
   /**
    * Polymer observer for pref.value.
    * @param {*} prefValue
    * @private
    */
   prefValueChanged_: function(prefValue) {
     this.checked = this.getNewValue_(prefValue);
   },
 
   /**
    * Polymer observer for checked.
    * @private
    */
   checkedChanged_: function() {
-    if (!this.pref)
+    if (!this.pref || this.noSetPref)
       return;
-    /** @type {boolean} */ var newValue = this.getNewValue_(this.checked);
-    // Ensure that newValue is the correct type for the pref type, either
-    // a boolean or a number.
-    if (this.pref.type == chrome.settingsPrivate.PrefType.NUMBER) {
-      this.set('pref.value', newValue ? 1 : 0);
-      return;
-    }
-    this.set('pref.value', newValue);
+    this.sendPrefChange();
   },
 
   /**
    * @param {*} value
    * @return {boolean} The value as a boolean, inverted if |inverted| is true.
    * @private
    */
   getNewValue_: function(value) {
     return this.inverted ? !value : !!value;
   },
 
   /**
    * @param {boolean} disabled
    * @param {!chrome.settingsPrivate.PrefObject} pref
    * @return {boolean} Whether the checkbox should be disabled.
    * @private
    */
   controlDisabled_: function(disabled, pref) {
     return disabled || this.isPrefPolicyControlled(pref);
   },
 };
 
 /** @polymerBehavior */
 var SettingsBooleanControlBehavior = [
   CrPolicyPrefBehavior,
   PrefControlBehavior,
   SettingsBooleanControlBehaviorImpl,
 ];