Add Settings bluetooth page test

chrome/test/data/webui/settings/settings_page_browsertest.js

Index: chrome/test/data/webui/settings/settings_page_browsertest.js
diff --git a/chrome/test/data/webui/settings/settings_page_browsertest.js b/chrome/test/data/webui/settings/settings_page_browsertest.js
index 2b8e53d2afbd2ca0e7258940699d20d58446fe5a..4948ebd2aa1896d6aa9b948bd9f549016187da9d 100644
--- a/chrome/test/data/webui/settings/settings_page_browsertest.js
+++ b/chrome/test/data/webui/settings/settings_page_browsertest.js
@@ -31,14 +31,14 @@ SettingsPageBrowserTest.prototype = {
 
   /**
    * @param {string} type The settings page type, e.g. 'advanced' or 'basic'.
-   * @return {Node} The DOM node for the page.
+   * @return {!PolymerElement} The PolymerElement for the page.

[michaelpg, 2015/11/24 15:55:49]

Cool, I didn't even know this extern existed.

[stevenjb, 2015/11/24 17:04:50]

Acknowledged.

    */
   getPage: function(type) {
     var settings = document.querySelector('cr-settings');
     assertTrue(!!settings);
-    var settingsUi = settings.shadowRoot.querySelector('settings-ui');
+    var settingsUi = settings.$$('settings-ui');
     assertTrue(!!settingsUi);
-    var settingsMain = settingsUi.shadowRoot.querySelector('settings-main');
+    var settingsMain = settingsUi.$$('settings-main');
     assertTrue(!!settingsMain);
     var pages = settingsMain.$.pageContainer;
     assertTrue(!!pages);
@@ -49,9 +49,9 @@ SettingsPageBrowserTest.prototype = {
   },
 
   /**
-   * @param {Node} page The DOM node for the settings page containing |section|.
+   * @param {!Node} page The DOM node for the page containing |section|.

[michaelpg, 2015/11/24 15:55:49]

!PolymerElement

[stevenjb, 2015/11/24 17:04:50]

Done.

    * @param {string} section The settings page section, e.g. 'appearance'.
-   * @return {Node} The DOM node for the section.
+   * @return {!SettingsSection} The DOM node for the section.
    */
   getSection: function(page, section) {
     var sections = page.shadowRoot.querySelectorAll('settings-section');