Add experimental accessibility features to Material Design settings

chrome/browser/resources/settings/a11y_page/a11y_page.js

Index: chrome/browser/resources/settings/a11y_page/a11y_page.js
diff --git a/chrome/browser/resources/settings/a11y_page/a11y_page.js b/chrome/browser/resources/settings/a11y_page/a11y_page.js
index dbb55f3f747e6407480ddd447ed4ee513987e435..109c99e568446dc848daab7982c03f9ba2aa89f1 100644
--- a/chrome/browser/resources/settings/a11y_page/a11y_page.js
+++ b/chrome/browser/resources/settings/a11y_page/a11y_page.js
@@ -25,6 +25,17 @@ Polymer({
       type: Object,
       notify: true,
     },
+
+    /**
+     * Whether to show experimental accessibility features.
+     * @private {boolean}
+     */
+    showExperimentalFeatures_: {
+      type: Boolean,
+      value: function() {
+        return loadTimeData.getBoolean('showExperimentalA11yFeatures');
+      },
+    }
   },
 
   /** @private */