Oilpan: have Screen be on the heap by default.

Source/core/frame/Screen.h

Index: Source/core/frame/Screen.h
diff --git a/Source/core/frame/Screen.h b/Source/core/frame/Screen.h
index 83a69eff9ba2b93eb78c0650779f15acd16423c2..a86867e22deaa39cf17b6b74fcb3732fe6e13bec 100644
--- a/Source/core/frame/Screen.h
+++ b/Source/core/frame/Screen.h
@@ -34,20 +34,19 @@
 #include "core/frame/DOMWindowProperty.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
 
 namespace blink {
 
 class LocalFrame;
 
-class Screen final : public RefCountedWillBeGarbageCollected<Screen>, public ScriptWrappable, public DOMWindowProperty, public WillBeHeapSupplementable<Screen> {
+// TODO(Oilpan): when ~DOMWindowProperty is removed, derive from GarbageCollected<> instead.

[haraken, 2015/04/24 08:51:11]

TODO(sof)? I'm not sure if people want to have "Oilpan" as a name.

[sof, 2015/04/24 08:53:27]

I prefer using team/topic labels (if any) to simplify future tidying; git blame
will tell you who added, if needed.

+class Screen final : public GarbageCollectedFinalized<Screen>, public ScriptWrappable, public DOMWindowProperty, public HeapSupplementable<Screen> {
     DEFINE_WRAPPERTYPEINFO();
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(Screen);
+    USING_GARBAGE_COLLECTED_MIXIN(Screen);
 public:
-    static PassRefPtrWillBeRawPtr<Screen> create(LocalFrame* frame)
+    static Screen* create(LocalFrame* frame)
     {
-        return adoptRefWillBeNoop(new Screen(frame));
+        return new Screen(frame);
     }
 
     unsigned height() const;