Change GestureConfiguration types to be consistent with each other and with the

chrome/browser/resources/gesture_config.js

 // Copyright (c) 2013 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.
 
 // Redefine '$' here rather than including 'cr.js', since this is
 // the only function needed.  This allows this file to be loaded
 // in a browser directly for layout and some testing purposes.
 var $ = function(id) { return document.getElementById(id); };
 
 /**
@@ skipping 150 matching lines @@
       key: 'fling_max_cancel_to_down_time_in_ms',
       label: 'Maximum Cancel to Down Time for Tap Suppression',
       units: 'milliseconds',
     },
     {
       key: 'fling_max_tap_gap_time_in_ms',
       label: 'Maximum Tap Gap Time for Tap Suppression',
       units: 'milliseconds',
     },
     {
-      key: 'semi_long_press_time_in_seconds',
+      key: 'semi_long_press_time_in_ms',
       label: 'Semi Long Press Time',
-      units: 'seconds',
-      step: 0.1
+      units: 'milliseconds',
     },
     {
       key: 'max_separation_for_gesture_touches_in_pixels',
       label: 'Maximum Separation for Gesture Touches',
       units: 'pixels'
     },
     {
       key: 'tab_scrub_activation_delay_in_ms',
       label: 'Tab scrub auto activation delay, (-1 for never)',
       units: 'milliseconds'
@@ skipping 127 matching lines @@
    */
   updatePreferenceValueResult: function(prefName, value, isDefault) {
     prefName = prefName.substring(prefName.indexOf('.') + 1);
     $(prefName).value = value;
     this.updateResetButton($(prefName + '-reset'), isDefault);
     this.updateResetAllButton(this.areAllPrefsSetToDefault());
   },
 };
 
 document.addEventListener('DOMContentLoaded', gesture_config.initialize);