Remove usage of {,un}setPendingActivity from SpeechRecognition

Source/modules/speech/SpeechRecognition.cpp

Index: Source/modules/speech/SpeechRecognition.cpp
diff --git a/Source/modules/speech/SpeechRecognition.cpp b/Source/modules/speech/SpeechRecognition.cpp
index 054d8161a99aef41e1990ec1571787117ab03010..e6a6fc378abe9951a8073900f01f6203b33f59ae 100644
--- a/Source/modules/speech/SpeechRecognition.cpp
+++ b/Source/modules/speech/SpeechRecognition.cpp
@@ -52,7 +52,6 @@ void SpeechRecognition::start(ExceptionState& exceptionState)
         return;
     }
 
-    setPendingActivity(this);
     m_finalResults.clear();
     m_controller->start(this, m_grammars.get(), m_lang, m_continuous, m_interimResults, m_maxAlternatives);
     m_started = true;
@@ -142,7 +141,6 @@ void SpeechRecognition::didEnd()
     m_stopping = false;
     if (!m_stoppedByActiveDOMObject)
         dispatchEvent(Event::create(EventTypeNames::end));
-    unsetPendingActivity(this);
 }
 
 const AtomicString& SpeechRecognition::interfaceName() const
@@ -162,6 +160,11 @@ void SpeechRecognition::stop()
         abort();
 }
 
+bool SpeechRecognition::hasPendingActivity() const
+{
+    return m_started;
+}
+
 SpeechRecognition::SpeechRecognition(ExecutionContext* context)
     : ActiveDOMObject(context)
     , m_grammars(SpeechGrammarList::create()) // FIXME: The spec is not clear on the default value for the grammars attribute.