Apply DEFINE/DECLARE_NODE_FACTORY(T) macro to element factories with single Document& argument.

Source/core/html/HTMLTrackElement.cpp

Index: Source/core/html/HTMLTrackElement.cpp
diff --git a/Source/core/html/HTMLTrackElement.cpp b/Source/core/html/HTMLTrackElement.cpp
index 4a71034e6debee3f8083f3f954e954eda9d2e62e..7efa63c426a565403615a97953e0a201e9fb9c07 100644
--- a/Source/core/html/HTMLTrackElement.cpp
+++ b/Source/core/html/HTMLTrackElement.cpp
@@ -58,6 +58,8 @@ inline HTMLTrackElement::HTMLTrackElement(Document& document)
     ScriptWrappable::init(this);
 }
 
+DEFINE_NODE_FACTORY(HTMLTrackElement)
+
 HTMLTrackElement::~HTMLTrackElement()
 {
 #if !ENABLE(OILPAN)
@@ -66,11 +68,6 @@ HTMLTrackElement::~HTMLTrackElement()
 #endif
 }
 
-PassRefPtrWillBeRawPtr<HTMLTrackElement> HTMLTrackElement::create(Document& document)
-{
-    return adoptRefWillBeRefCountedGarbageCollected(new HTMLTrackElement(document));
-}
-
 Node::InsertionNotificationRequest HTMLTrackElement::insertedInto(ContainerNode* insertionPoint)
 {
     WTF_LOG(Media, "HTMLTrackElement::insertedInto");