Add a modal confirmation dialog to the enterprise profile sign-in flow.

chrome/browser/resources/profile_signin_confirmation.js

Index: chrome/browser/resources/profile_signin_confirmation.js
diff --git a/chrome/browser/resources/profile_signin_confirmation.js b/chrome/browser/resources/profile_signin_confirmation.js
new file mode 100644
index 0000000000000000000000000000000000000000..51f0e4c849cf57788fc50768fb72921127024b66
--- /dev/null
+++ b/chrome/browser/resources/profile_signin_confirmation.js
@@ -0,0 +1,27 @@
+cr.define('profile_signin_confirmation', function() {
+  'use strict';
+
+  function initialize() {
+    var args = JSON.parse(chrome.getVariableValue('dialogArguments'));
+    $('dialog-message').textContent = loadTimeData.getStringF(
+        'dialogMessage', args.username);
+    $('dialog-prompt').textContent = loadTimeData.getStringF(
+        'dialogPrompt', args.username);
+    $('create-button').addEventListener('click', function() {
+      chrome.send('createNewProfile');
+    });
+    $('continue-button').addEventListener('click', function() {
+      chrome.send('continue');
+    });
+    $('cancel-button').addEventListener('click', function() {
+      chrome.send('cancel');
+    });
+  }
+
+  return {
+    initialize: initialize
+  };
+});
+
+document.addEventListener('DOMContentLoaded',
+                          profile_signin_confirmation.initialize);