Oilpan: Prepare moving AXObject to heap

Source/modules/accessibility/AXSlider.cpp

Index: Source/modules/accessibility/AXSlider.cpp
diff --git a/Source/modules/accessibility/AXSlider.cpp b/Source/modules/accessibility/AXSlider.cpp
index a5dba4554488380f7a7c49974c1329f202d2da60..abca45941faf030ca35f8cbefb5bb320065ff62f 100644
--- a/Source/modules/accessibility/AXSlider.cpp
+++ b/Source/modules/accessibility/AXSlider.cpp
@@ -44,9 +44,9 @@ AXSlider::AXSlider(LayoutObject* layoutObject, AXObjectCacheImpl* axObjectCache)
 {
 }
 
-PassRefPtr<AXSlider> AXSlider::create(LayoutObject* layoutObject, AXObjectCacheImpl* axObjectCache)
+PassRefPtrWillBeRawPtr<AXSlider> AXSlider::create(LayoutObject* layoutObject, AXObjectCacheImpl* axObjectCache)
 {
-    return adoptRef(new AXSlider(layoutObject, axObjectCache));
+    return adoptRefWillBeNoop(new AXSlider(layoutObject, axObjectCache));
 }
 
 AccessibilityRole AXSlider::determineAccessibilityRole()
@@ -98,10 +98,11 @@ void AXSlider::addChildren()
 
     // Before actually adding the value indicator to the hierarchy,
     // allow the platform to make a final decision about it.
-    if (thumb->accessibilityIsIgnored())
+    if (thumb->accessibilityIsIgnored()) {
         cache->remove(thumb->axObjectID());
-    else
+    } else {
         m_children.append(thumb);
+    }
 }
 
 const AtomicString& AXSlider::getAttribute(const QualifiedName& attribute) const
@@ -143,9 +144,9 @@ AXSliderThumb::AXSliderThumb(AXObjectCacheImpl* axObjectCache)
 {
 }
 
-PassRefPtr<AXSliderThumb> AXSliderThumb::create(AXObjectCacheImpl* axObjectCache)
+PassRefPtrWillBeRawPtr<AXSliderThumb> AXSliderThumb::create(AXObjectCacheImpl* axObjectCache)
 {
-    return adoptRef(new AXSliderThumb(axObjectCache));
+    return adoptRefWillBeNoop(new AXSliderThumb(axObjectCache));
 }
 
 LayoutRect AXSliderThumb::elementRect() const