Implement support for chorded braille commands

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 617373eff1b9910ea2ef10be6f13f03780051562..8abf50e67928c0023512926588762142990ecd35 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
@@ -12,6 +12,7 @@ goog.provide('Background');
 goog.require('AutomationPredicate');
 goog.require('AutomationUtil');
 goog.require('BackgroundKeyboardHandler');
+goog.require('BrailleCommandHandler');
 goog.require('ChromeVoxState');
 goog.require('CommandHandler');
 goog.require('FindHandler');
@@ -548,6 +549,12 @@ Background.prototype = {
             // Cast ok since displayPosition is always defined in this case.
             /** @type {number} */ (evt.displayPosition));
         break;
+      case cvox.BrailleKeyCommand.CHORD:
+        if (!evt.brailleDots)
+          return false;
+
+        BrailleCommandHandler.onBrailleCommand(evt.brailleDots);
+        break;
       default:
         return false;
     }