Oilpan: Replace RefPtrs to Node and its subclasses in core/html with Oilpan transitin types.

Source/core/html/shadow/SpinButtonElement.cpp

Index: Source/core/html/shadow/SpinButtonElement.cpp
diff --git a/Source/core/html/shadow/SpinButtonElement.cpp b/Source/core/html/shadow/SpinButtonElement.cpp
index 8031b02a4ed4b7779d390a06a964c7cb5bfddce3..efaf225ca41c8225e78c33af6229ec6b8e31e285 100644
--- a/Source/core/html/shadow/SpinButtonElement.cpp
+++ b/Source/core/html/shadow/SpinButtonElement.cpp
@@ -52,9 +52,9 @@ inline SpinButtonElement::SpinButtonElement(Document& document, SpinButtonOwner&
 {
 }
 
-PassRefPtr<SpinButtonElement> SpinButtonElement::create(Document& document, SpinButtonOwner& spinButtonOwner)
+PassRefPtrWillBeRawPtr<SpinButtonElement> SpinButtonElement::create(Document& document, SpinButtonOwner& spinButtonOwner)
 {
-    RefPtr<SpinButtonElement> element = adoptRef(new SpinButtonElement(document, spinButtonOwner));
+    RefPtrWillBeRawPtr<SpinButtonElement> element = adoptRefWillBeRefCountedGarbageCollected(new SpinButtonElement(document, spinButtonOwner));
     element->setShadowPseudoId(AtomicString("-webkit-inner-spin-button", AtomicString::ConstructFromLiteral));
     element->setAttribute(idAttr, ShadowElementNames::spinButton());
     return element.release();
@@ -94,7 +94,7 @@ void SpinButtonElement::defaultEventHandler(Event* event)
             // The following functions of HTMLInputElement may run JavaScript
             // code which detaches this shadow node. We need to take a reference
             // and check renderer() after such function calls.
-            RefPtr<Node> protector(this);
+            RefPtrWillBeRawPtr<Node> protector(this);
             if (m_spinButtonOwner)
                 m_spinButtonOwner->focusAndSelectSpinButtonOwner();
             if (renderer()) {