Oilpan: move platform speech objects to the heap.

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 a6cc5a526b964d251b4af928fea4f57eca2e65ca..eb0dcaf0af73e550fcdeb547d577f3d4c0b498a6 100644
--- a/Source/modules/speech/SpeechRecognition.cpp
+++ b/Source/modules/speech/SpeechRecognition.cpp
@@ -171,7 +171,7 @@ SpeechRecognition::SpeechRecognition(ExecutionContext* context)
     , m_continuous(false)
     , m_interimResults(false)
     , m_maxAlternatives(1)
-    , m_controller(0)
+    , m_controller(nullptr)
     , m_stoppedByActiveDOMObject(false)
     , m_started(false)
     , m_stopping(false)
@@ -195,6 +195,9 @@ SpeechRecognition::~SpeechRecognition()
 void SpeechRecognition::trace(Visitor* visitor)
 {
     visitor->trace(m_grammars);
+#if ENABLE(OILPAN)
+    visitor->trace(m_controller);
+#endif
     visitor->trace(m_finalResults);
     EventTargetWithInlineData::trace(visitor);
 }