Fix implementation of StopSpeaking, and implement IsSpeaking, for the...

chrome/browser/extensions/extension_tts_api_win.cc

 // Copyright (c) 2010 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/extensions/extension_tts_api.h"
 
 #include <atlbase.h>
 #include <atlcom.h>
 #include <sapi.h>
 
@@ skipping 76 matching lines @@
 
   if (paused_)
     speech_synthesizer_->Resume();
   speech_synthesizer_->Speak(
       utterance.c_str(), SPF_ASYNC | SPF_PURGEBEFORESPEAK, NULL);
 
   return true;
 }
 
 bool ExtensionTtsPlatformImplWin::StopSpeaking() {
-  if (!speech_synthesizer_ && !paused_) {
+  if (speech_synthesizer_ && !paused_) {
     speech_synthesizer_->Pause();
     paused_ = true;
   }
   return true;
 }
 
 bool ExtensionTtsPlatformImplWin::IsSpeaking() {
+  if (speech_synthesizer_ && !paused_) {
+    SPVOICESTATUS status;
+    HRESULT result = speech_synthesizer_->GetStatus(&status, NULL);
+    if (result == S_OK && status.dwRunningState == SPRS_IS_SPEAKING)
+      return true;
+  }
   return false;
 }
 
 ExtensionTtsPlatformImplWin::ExtensionTtsPlatformImplWin()
   : speech_synthesizer_(NULL),
     paused_(false) {
   CoCreateInstance(
       CLSID_SpVoice,
       NULL,
       CLSCTX_SERVER,
       IID_ISpVoice,
       reinterpret_cast<void**>(&speech_synthesizer_));
 }
 
 // static
 ExtensionTtsPlatformImplWin* ExtensionTtsPlatformImplWin::GetInstance() {
   return Singleton<ExtensionTtsPlatformImplWin>::get();
 }