Make updates to ChromeVox KB Explorer for Next.

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

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
index 5f0462c36b16502ce8d27084da69a05970374179..ea2ba4aa944ce427f8f086f5d8ab3c61816905b5 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
@@ -122,8 +122,8 @@ Background = function() {
 
   cvox.ExtensionBridge.addMessageListener(this.onMessage_);
 
-  document.addEventListener('keydown', this.onKeyDown.bind(this), true);
-  document.addEventListener('keyup', this.onKeyUp.bind(this), true);
+  document.addEventListener('keydown', this.onKeyDown.bind(this), false);
+  document.addEventListener('keyup', this.onKeyUp.bind(this), false);
   cvox.ChromeVoxKbHandler.commandHandler = this.onGotCommand.bind(this);
 
   // Classic keymap.
@@ -536,6 +536,9 @@ Background.prototype = {
       case 'increaseTtsVolume':
         this.increaseOrDecreaseSpeechProperty_(cvox.AbstractTts.VOLUME, true);
         break;
+      case 'stopSpeech':
+        cvox.ChromeVox.tts.stop();

[dmazzoni, 2016/02/17 04:57:15]

Just checking, does this stop continuous reading and other things we may be
queuing up based on speech end callbacks?

[David Tseng, 2016/02/17 19:30:11]

Set the global.isReading flag to false. It looks like it does stop continuous
read, but the flag isn't reset.

+        return false;
       default:
         return true;
     }