Reland: Make ChromeVox Next a setting in options page

chrome/browser/resources/chromeos/chromevox/chromevox/background/options.js

Index: chrome/browser/resources/chromeos/chromevox/chromevox/background/options.js
diff --git a/chrome/browser/resources/chromeos/chromevox/chromevox/background/options.js b/chrome/browser/resources/chromeos/chromevox/chromevox/background/options.js
index 1cc387396b88a39c6f64830a27b2fe9ccdee62eb..7adedde18c0c39f1d67881cbe78d163a67bcee9b 100644
--- a/chrome/browser/resources/chromeos/chromevox/chromevox/background/options.js
+++ b/chrome/browser/resources/chromeos/chromevox/chromevox/background/options.js
@@ -95,29 +95,11 @@ cvox.OptionsPage.init = function() {
         chrome.app.getDetails().version;
   }
 
-  // Temporary secret way to enable ChromeVox Next for the current run of
-  // ChromeVox.
-  var next = 'next';
-  document.body.addEventListener('keypress', function(evt) {
-    if (next === undefined) {
-      return;
-    }
-    var key = String.fromCharCode(evt.charCode);
-    if (next[0] === key) {
-      next = next.slice(1);
-
-      if (next === '') {
-        cvox.OptionsPage.speak(
-            'You are now running ChromeVox Next; open a new tab to start',
-            cvox.QueueMode.FLUSH);
-        next = undefined;
-        chrome.extension.getBackgroundPage()['global']
-            .backgroundObj.forceChromeVoxNextActive();
-      }
-    } else {
-      next = 'next';
-    }
-    return true;
+  $('useNext').addEventListener('change', function(evt) {
+    var checked = evt.target.checked;
+    var background =
+        chrome.extension.getBackgroundPage().ChromeVoxState.instance;
+    background.toggleNext(checked);
   }, true);
 };