MD Settings: focus header when dialog shows to signal to AT what's going on

chrome/test/data/webui/cr_elements/cr_elements_browsertest.js

Index: chrome/test/data/webui/cr_elements/cr_elements_browsertest.js
diff --git a/chrome/test/data/webui/cr_elements/cr_elements_browsertest.js b/chrome/test/data/webui/cr_elements/cr_elements_browsertest.js
index a4f41d7a2cf36c990d69dd0d4201fc32e5d8ab6a..20cb50e977d10a4584d3ca01a9ebfd204b46d94f 100644
--- a/chrome/test/data/webui/cr_elements/cr_elements_browsertest.js
+++ b/chrome/test/data/webui/cr_elements/cr_elements_browsertest.js
@@ -37,6 +37,10 @@ CrElementsBrowserTest.prototype = {
   },
 };
 
+/**
+ * @constructor
+ * @extends {CrElementsBrowserTest}
+ */
 function CrElementsLazyRenderTest() {}
 
 /**
@@ -175,6 +179,10 @@ TEST_F('CrElementsScrollableBehaviorTest', 'All', function() {
   mocha.run();
 });
 
+/**
+ * @constructor
+ * @extends {CrElementsBrowserTest}
+ */
 function CrElementsPolicyPrefIndicatorTest() {}
 
 CrElementsPolicyPrefIndicatorTest.prototype = {
@@ -193,3 +201,25 @@ CrElementsPolicyPrefIndicatorTest.prototype = {
 TEST_F('CrElementsPolicyPrefIndicatorTest', 'All', function() {
   mocha.run();
 });
+
+/**
+ * @constructor
+ * @extends {CrElementsBrowserTest}
+ */
+function CrElementsDialogTest() {}
+
+CrElementsDialogTest.prototype = {
+  __proto__: CrElementsBrowserTest.prototype,
+
+  /** @override */
+  browsePreload: 'chrome://resources/cr_elements/cr_dialog/cr_dialog.html',
+
+  /** @override */
+  extraLibraries: CrElementsBrowserTest.prototype.extraLibraries.concat([
+    'cr_dialog_test.js',
+  ]),
+};
+
+TEST_F('CrElementsDialogTest', 'All', function() {
+  mocha.run();
+});