Lock screen pin keyboard ui upgrades.

chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js

Index: chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
diff --git a/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js b/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
index 9b9ba5dad8b5dc2ba8c528ddea38566061751d5e..ead7468b7758b7a06f409c3a633768e25ba68780 100644
--- a/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
+++ b/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
@@ -127,15 +127,24 @@ Polymer({
   },
 
   /**
-   * Changes the color of the submit button if PIN is ready.
+   * Changes the color of input text if a something is entered.

[jdufault, 2016/08/05 21:58:52]

What about:

Changes the color of the input text if it is not empty.

[sammiequon, 2016/08/05 23:34:50]

Done.

    * @param {string} value
    * @private
    */
-  getSubmitClass_: function(value) {
+  getPasswordReadyClass_: function(value) {
     return value.length > 0 ? 'ready-background' : '';
   },
 
   /**
+   * Disables the submit and backspace button if nothing is entered.
+   * @param {string} value
+   * @private
+   */
+  getButtonsDisabled_: function(value) {

[jdufault, 2016/08/05 21:58:52]

Rename to hasInput_

[sammiequon, 2016/08/05 23:34:50]

Done.

+    return value.length > 0 ? false : true;

[jdufault, 2016/08/05 21:58:51]

return value.length == 0;

[sammiequon, 2016/08/05 23:34:50]

Done.

+  },
+
+  /**
    * Computes whether the input type for the pin input should be password or
    * numerical.
    * @param {boolean} enablePassword
@@ -178,7 +187,7 @@ Polymer({
    * @param {boolean} submitEnabled
    * @private
    */
-  getSubmitHiddenClass_: function(submitEnabled) {
+  getSubmitClass_: function(submitEnabled) {
     return submitEnabled ? '' : 'submit-button-hidden';
   }
 });