Support for providing media stream audio track to speech recognition

Source/web/SpeechRecognitionClientProxy.cpp

Index: Source/web/SpeechRecognitionClientProxy.cpp
diff --git a/Source/web/SpeechRecognitionClientProxy.cpp b/Source/web/SpeechRecognitionClientProxy.cpp
index 479f15d5ed6cbc5bad804618516c0547c1a9c980..6c56e4c14822c2516ebad7d26029b47126b9456d 100644
--- a/Source/web/SpeechRecognitionClientProxy.cpp
+++ b/Source/web/SpeechRecognitionClientProxy.cpp
@@ -33,6 +33,7 @@
 #include "modules/speech/SpeechRecognitionResult.h"
 #include "modules/speech/SpeechRecognitionResultList.h"
 #include "platform/weborigin/SecurityOrigin.h"
+#include "public/platform/WebMediaStreamTrack.h"
 #include "public/web/WebSecurityOrigin.h"
 #include "public/web/WebSpeechGrammar.h"
 #include "public/web/WebSpeechRecognitionHandle.h"
@@ -52,6 +53,14 @@ PassOwnPtr<SpeechRecognitionClientProxy> SpeechRecognitionClientProxy::create(We
     return adoptPtr(new SpeechRecognitionClientProxy(recognizer));
 }
 
+void SpeechRecognitionClientProxy::attach(SpeechRecognition* recognition, MediaStreamTrack* audioTrack)
+{
+    if (audioTrack)
+        m_recognizer->attach(WebSpeechRecognitionHandle(recognition), audioTrack->component(), this);
+    else
+        m_recognizer->detach(WebSpeechRecognitionHandle(recognition), this);
+}
+
 void SpeechRecognitionClientProxy::start(SpeechRecognition* recognition, const SpeechGrammarList* grammarList, const String& lang, bool continuous, bool interimResults, unsigned long maxAlternatives)
 {
     WebVector<WebSpeechGrammar> webSpeechGrammars(static_cast<size_t>(grammarList->length()));