Turn webspeech on/off when tab goes fore/background

content/renderer/speech_recognition_dispatcher.cc

Index: content/renderer/speech_recognition_dispatcher.cc
diff --git a/content/renderer/speech_recognition_dispatcher.cc b/content/renderer/speech_recognition_dispatcher.cc
index e59082d33dce2e55e0362ac0719fc8ec1349b9d5..076d8e92f8ae8d60f86f4cd65e090fb0f8b64427 100644
--- a/content/renderer/speech_recognition_dispatcher.cc
+++ b/content/renderer/speech_recognition_dispatcher.cc
@@ -36,12 +36,8 @@ SpeechRecognitionDispatcher::~SpeechRecognitionDispatcher() {
 }
 
 void SpeechRecognitionDispatcher::AbortAllRecognitions() {
-  for (HandleMap::iterator iter = handle_map_.begin();
-      iter != handle_map_.end();
-      ++iter) {
-    // OnEnd event will be sent to the SpeechRecognition object later.
-    abort(iter->second, recognizer_client_);
-  }
+  Send(new SpeechRecognitionHostMsg_AbortAllRequest(
+      routing_id()));
 }
 
 bool SpeechRecognitionDispatcher::OnMessageReceived(