Revert of Make ChromeVox Next a setting in options page.

chrome/browser/resources/chromeos/chromevox/cvox2/background/chromevox_state.js

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/chromevox_state.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/chromevox_state.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/chromevox_state.js
index 372f8b5f5ce98a247a4220ab0099227e548c8d46..58208c3e4a67cd98c85c6e20b8db944234f4c90b 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/chromevox_state.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/chromevox_state.js
@@ -39,17 +39,6 @@
  */
 ChromeVoxState.instance;
 
-/**
- * Holds the un-composite tts object.
- * @type {Object}
- */
-ChromeVoxState.backgroundTts;
-
-/**
- * @type {boolean}
-  */
-  ChromeVoxState.isReadingContinuously;
-
 ChromeVoxState.prototype = {
   /** @type {ChromeVoxMode} */
   get mode() {
@@ -63,6 +52,20 @@
   getMode: function() {
     return ChromeVoxMode.NEXT;
   },
+
+  /**
+   * Sets the current ChromeVox mode.
+   * @param {ChromeVoxMode} mode
+   * @param {boolean=} opt_injectClassic Injects ChromeVox classic into tabs;
+   *                                     defaults to false.
+   */
+  setMode: goog.abstractMethod,
+
+  /**
+   * Refreshes the current mode based on a node.
+   * @param {!chrome.automation.AutomationNode} url
+   */
+  refreshMode: goog.abstractMethod,
 
   /** @type {cursors.Range} */
   get currentRange() {