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 a598db638a48d539d0cff0c859230301cf86d8f3..7580e094f4112a8f50edaf15fdae4d391efc285d 100644
--- a/Source/modules/speech/SpeechRecognition.cpp
+++ b/Source/modules/speech/SpeechRecognition.cpp
@@ -53,6 +53,12 @@ void SpeechRecognition::start(ExceptionState& exceptionState)
     }
 
     m_finalResults.clear();
+
+    if (m_audioTrack)
+        m_controller->setAudioTrack(this, m_audioTrack);
+    else
+        m_controller->clearAudioTrack(this);

[no longer working on chromium, 2014/08/14 15:41:34]

you don't need clearAudioTrack, just do m_controller->setAudioTrack(this,
m_audioTrack) regardless if m_audioTrack is nullptr or not.

[burnik, 2014/08/14 16:35:14]

Done.

+
     m_controller->start(this, m_grammars.get(), m_lang, m_continuous, m_interimResults, m_maxAlternatives);
     m_started = true;
 }
@@ -195,6 +201,7 @@ SpeechRecognition::~SpeechRecognition()
 void SpeechRecognition::trace(Visitor* visitor)
 {
     visitor->trace(m_grammars);
+    visitor->trace(m_audioTrack);
 #if ENABLE(OILPAN)
     visitor->trace(m_controller);
 #endif