Add ChromeVox panel and implement caption display functionality.

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

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/output.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/output.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/output.js
index 74949054871ed5bdc36edc7bf0d538d2217996ae..76e6e368fa33dfedcd11f58a3325f6622c37ae2a 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/output.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/output.js
@@ -11,6 +11,7 @@ goog.provide('Output.EventType');
 
 goog.require('AutomationUtil.Dir');
 goog.require('EarconEngine');
+goog.require('Panel');
 goog.require('cursors.Cursor');
 goog.require('cursors.Range');
 goog.require('cursors.Unit');
@@ -708,6 +709,18 @@ Output.prototype = {
         this.speechProperties_['endCallback'] = null;
       cvox.ChromeVox.tts.speak(
           buff.toString(), queueMode, this.speechProperties_);
+      if (queueMode == cvox.QueueMode.FLUSH)
+          (new PanelCommand(PanelCommandType.CLEAR_SPEECH)).send();
+      if (this.speechProperties_.relativePitch ==
+              cvox.AbstractTts.PERSONALITY_ANNOTATION.relativePitch) {
+        (new PanelCommand(
+            PanelCommandType.ADD_ANNOTATION_SPEECH,
+            buff.toString())).send();
+      } else {
+        (new PanelCommand(
+            PanelCommandType.ADD_NORMAL_SPEECH,
+            buff.toString())).send();
+      }

[Peter Lundblad, 2015/11/06 15:00:58]

Why is this needed here in addition to background_tts.js?

[dmazzoni, 2015/11/06 21:01:00]

I was thinking we could provide more detailed information here. But for now I'll
delete this for simplicity.

       queueMode = cvox.QueueMode.QUEUE;
     }.bind(this));