[Harmony] Harmonize Bluetooth dialogs.

chrome/browser/resources/options/chromeos/bluetooth_pair_device_overlay.js

Index: chrome/browser/resources/options/chromeos/bluetooth_pair_device_overlay.js
diff --git a/chrome/browser/resources/options/chromeos/bluetooth_pair_device_overlay.js b/chrome/browser/resources/options/chromeos/bluetooth_pair_device_overlay.js
index b3ece1c910739e416428ba8c74b95f1ac71ce10c..bf55801940fe76bbc10c84932bd435f2ee8c4add 100644
--- a/chrome/browser/resources/options/chromeos/bluetooth_pair_device_overlay.js
+++ b/chrome/browser/resources/options/chromeos/bluetooth_pair_device_overlay.js
@@ -180,6 +180,8 @@ cr.define('options', function() {
           this.keyDownEventHandler_.bind(this));
       $('bluetooth-pincode').addEventListener('keydown',
           this.keyDownEventHandler_.bind(this));
+      $('bluetooth-pairing-close-button').addEventListener('click',
+          this.onClose_.bind(this));
     },
 
     /** @override */
@@ -336,6 +338,16 @@ cr.define('options', function() {
     },
 
     /**
+     * Handles the click event on the close button.
+     * @param {Event} event A click down event.
+     * @private
+     */
+    onClose_: function(event) {
+      event.preventDefault();
+      chrome.send('dialogClose');
+    },
+
+    /**
      * Updates the visibility of elements in the dialog.
      * @param {Array<string>} list List of conditionally visible elements that
      *     are to be made visible.