Save slider preferences when using touch.

chrome/browser/resources/options/pref_ui.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.
 
 cr.define('options', function() {
 
   var Preferences = options.Preferences;
 
   /**
    * Allows an element to be disabled for several reasons.
@@ skipping 278 matching lines @@
     decorate: function() {
       PrefInputElement.prototype.decorate.call(this);
       this.type = 'range';
 
       // Listen for user events.
       // TODO(jhawkins): Add onmousewheel handling once the associated WK bug is
       // fixed.
       // https://bugs.webkit.org/show_bug.cgi?id=52256
       this.addEventListener('keyup', this.handleRelease_.bind(this));
       this.addEventListener('mouseup', this.handleRelease_.bind(this));
+      this.addEventListener('touchcancel', this.handleRelease_.bind(this));
+      this.addEventListener('touchend', this.handleRelease_.bind(this));
     },
 
     /**
      * Update the associated pref when when the user releases the slider.
      * @private
      */
     updatePrefFromState_: function() {
       Preferences.setIntegerPref(this.pref, this.mapPositionToPref(this.value),
                                  !this.dialogPref, this.metric);
     },
@@ skipping 244 matching lines @@
     PrefNumber: PrefNumber,
     PrefRadio: PrefRadio,
     PrefRange: PrefRange,
     PrefSelect: PrefSelect,
     PrefTextField: PrefTextField,
     PrefPortNumber: PrefPortNumber,
     PrefButton: PrefButton
   };
 
 });