Support for providing media stream audio track to speech recognition

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 dfc7248b8200de148c4f02aeca0b4c894278657d..54f5aacae29f8709120ecff554366d11e5655024 100644
--- a/Source/modules/speech/SpeechRecognition.cpp
+++ b/Source/modules/speech/SpeechRecognition.cpp
@@ -53,7 +53,7 @@ void SpeechRecognition::start(ExceptionState& exceptionState)
     }
 
     m_finalResults.clear();
-    m_controller->start(this, m_grammars.get(), m_lang, m_continuous, m_interimResults, m_maxAlternatives);
+    m_controller->start(this, m_grammars.get(), m_lang, m_continuous, m_interimResults, m_maxAlternatives, m_audioTrack);
     m_started = true;
 }
 
@@ -168,6 +168,7 @@ bool SpeechRecognition::hasPendingActivity() const
 SpeechRecognition::SpeechRecognition(ExecutionContext* context)
     : ActiveDOMObject(context)
     , m_grammars(SpeechGrammarList::create()) // FIXME: The spec is not clear on the default value for the grammars attribute.
+    , m_audioTrack(nullptr)
     , m_continuous(false)
     , m_interimResults(false)
     , m_maxAlternatives(1)
@@ -194,6 +195,7 @@ SpeechRecognition::~SpeechRecognition()
 void SpeechRecognition::trace(Visitor* visitor)
 {
     visitor->trace(m_grammars);
+    visitor->trace(m_audioTrack);
 #if ENABLE(OILPAN)
     visitor->trace(m_controller);
 #endif