Added strings of i18n and made the pin-keyboard work for rtl lang.

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 dfc111d4c5fcd7c32df8aa1e7a95762d0894bfbb..93671d6b347a44005e2a8f1e8879b98737ed68c6 100644
--- a/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
+++ b/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
@@ -26,6 +26,13 @@ Polymer({
   is: 'pin-keyboard',
 
   properties: {
+    enablepassword: {
+      type: Boolean,
+      notify: true,
+      value: false,
+      observer: 'onInputTypeChange_'
+    },
+
     /** The value stored in the keyboard's input element. */
     value: {
       type: String,
@@ -51,6 +58,12 @@ Polymer({
     this.fire('submit', { pin: this.value });
   },
 
+  updateRtlState_: function(password) {
+    var shouldRtl = !Number.isInteger(+password);

[jdufault, 2016/06/28 21:13:22]

Add a comment describing this behavior.

shouldRtl => isNumeric

[sammiequon, 2016/06/28 22:43:38]

Done.

+    this.$$('#pin-input').classList.toggle(
+        'pin-keyboard-input-non-pin', shouldRtl);
+  },
+
   /**
    * Fires an update event with the current PIN value. The event will only be
    * fired if the PIN value has actually changed.
@@ -58,8 +71,10 @@ Polymer({
    * @param {string} previous
    */
   onPinValueChange_: function(value, previous) {
-    if (value != previous)
+    if (value != previous) {
       this.fire('pin-change', { pin: value });
+      this.updateRtlState_(value);
+    }
   },
 
   /** Called when the user wants to erase the last character of the entered
@@ -84,5 +99,20 @@ Polymer({
       event.preventDefault();
       return;
     }
+  },
+
+  /**
+   * Changes the input type for the pin-keyboard input element, based on the
+   * input specified for the pin-keyboard.
+   * @param {string} value
+   * @param {string} previous
+   */
+  onInputTypeChange_: function(value, previous) {
+    if (value != previous && value != null) {

[jdufault, 2016/06/28 21:13:22]

Why do you need this check? Do we need the value of previous?

[sammiequon, 2016/06/28 22:43:38]

Done.

+      if (value)
+        this.$$('#pin-input').type = 'password';
+      else
+        this.$$('#pin-input').type = 'number';
+    }
   }
 });