Implemented new UI for error messages on OOBE/Login.

chrome/browser/resources/chromeos/login/screen_tpm_error.js

Index: chrome/browser/resources/chromeos/login/screen_tpm_error.js
diff --git a/chrome/browser/resources/chromeos/login/screen_tpm_error.js b/chrome/browser/resources/chromeos/login/screen_tpm_error.js
index 31a5df17024aee33f42cd17137f0d9585948f46c..3843ef806db195d85b235342f8689f7648ead2c5 100644
--- a/chrome/browser/resources/chromeos/login/screen_tpm_error.js
+++ b/chrome/browser/resources/chromeos/login/screen_tpm_error.js
@@ -28,7 +28,22 @@ cr.define('login', function() {
 
     /** @override */
     decorate: function() {
-    }
+    },
+
+    /**
+     * Buttons in oobe wizard's button strip.
+     * @type {array} Array of Buttons.
+     */
+     get buttons() {
+       var rebootButton = this.ownerDocument.createElement('button');
+       rebootButton.id = 'reboot-button';
+       rebootButton.textContent =
+         loadTimeData.getString('errorTpmFailureRebootButton');
+       rebootButton.addEventListener('click', function() {
+           chrome.send('rebootSystem');
+       });
+       return [rebootButton];
+     },
   };
 
   /**