Lock screen pin keyboard ui upgrades.

chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.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
  * 'pin-keyboard' is a keyboard that can be used to enter PINs or more generally
  * numeric values.
  *
  * Properties:
@@ skipping 109 matching lines @@
 
     // Enter pressed.
     if (event.keyCode == 13) {
       this.firePinSubmitEvent_();
       event.preventDefault();
       return;
     }
   },
 
   /**
-   * Changes the color of the submit button if PIN is ready.
+   * Disables the submit and backspace button if nothing is entered.
    * @param {string} value
    * @private
    */
-  getSubmitClass_: function(value) {
-    return value.length > 0 ? 'ready-background' : '';
+  hasInput_: function(value) {
+    return value.length > 0;
   },
 
   /**
    * Computes whether the input type for the pin input should be password or
    * numerical.
    * @param {boolean} enablePassword
    * @private
    */
   getInputType_: function(enablePassword) {
     return enablePassword ? 'password' : 'number';
   },
 
   /**
    * Computes the value of the pin input placeholder.
    * @param {boolean} enablePassword
    * @private
    */
   getInputPlaceholder_: function(enablePassword) {
     return enablePassword ? this.i18n('pinKeyboardPlaceholderPinPassword') :
                             this.i18n('pinKeyboardPlaceholderPin');
   },
 
   /**
    * Computes the direction of the pin input.
    * @param {string} password
    * @private
    */
-  getInputClass_: function(password) {
+  isInputRtl_: function(password) {
     // +password will convert a string to a number or to NaN if that's not
     // possible. Number.isInteger will verify the value is not a NaN and that it
     // does not contain decimals.
     // This heuristic will fail for inputs like '1.0'.
     //
     // Since we still support users entering their passwords through the PIN
     // keyboard, we swap the input box to rtl when we think it is a password
     // (just numbers), if the document direction is rtl.
-    var enableRtl = (document.dir == 'rtl') && !Number.isInteger(+password);
-    return enableRtl ? 'input-non-pin' : '';
+    return (document.dir == 'rtl') && !Number.isInteger(+password);
   },
-
-  /**
-   * Computes if the submit button is visible.
-   * @param {boolean} submitEnabled
-   * @private
-   */
-  getSubmitHiddenClass_: function(submitEnabled) {
-    return submitEnabled ? '' : 'submit-button-hidden';
-  }
 });