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 3d76c20b90825a495e7da382468866f87e26a8b4..e59082d33dce2e55e0362ac0719fc8ec1349b9d5 100644
--- a/content/renderer/speech_recognition_dispatcher.cc
+++ b/content/renderer/speech_recognition_dispatcher.cc
@@ -35,6 +35,15 @@ SpeechRecognitionDispatcher::SpeechRecognitionDispatcher(
 SpeechRecognitionDispatcher::~SpeechRecognitionDispatcher() {
 }
 
+void SpeechRecognitionDispatcher::AbortAllRecognitions() {
+  for (HandleMap::iterator iter = handle_map_.begin();
+      iter != handle_map_.end();

[no longer working on chromium, 2014/07/24 11:00:29]

fix the indentation

+      ++iter) {
+    // OnEnd event will be sent to the SpeechRecognition object later.
+    abort(iter->second, recognizer_client_);
+  }
+}
+
 bool SpeechRecognitionDispatcher::OnMessageReceived(
     const IPC::Message& message) {
   bool handled = true;