Chrome OS TTS API should not report it's speaking when it's not.

chrome/browser/speech/extension_api/tts_extension_api_chromeos.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/speech/extension_api/tts_extension_api_chromeos.h"
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/memory/singleton.h"
@@ skipping 149 matching lines @@
     return true;
   }
 
   chromeos::DBusThreadManager::Get()->GetSpeechSynthesizerClient()->
       StopSpeaking();
   return true;
 }
 
 bool ExtensionTtsPlatformImplChromeOs::IsSpeaking() {
   // Defers to controller's utterance based detection of is speaking.
-  return true;
+  return false;
 }
 
 bool ExtensionTtsPlatformImplChromeOs::SendsEvent(TtsEventType event_type) {
   return (event_type == TTS_EVENT_START ||
           event_type == TTS_EVENT_END ||
           event_type == TTS_EVENT_ERROR);
 }
 
 void ExtensionTtsPlatformImplChromeOs::Enable() {
   enabled_ = true;
@@ skipping 56 matching lines @@
 // static
 ExtensionTtsPlatformImplChromeOs*
 ExtensionTtsPlatformImplChromeOs::GetInstance() {
   return Singleton<ExtensionTtsPlatformImplChromeOs>::get();
 }
 
 // global
 void EnableChromeOsTts() {
   ExtensionTtsPlatformImplChromeOs::GetInstance()->Enable();
 }