Oilpan: have Screen be on the heap by default.

Source/modules/screen_orientation/ScreenScreenOrientation.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ScreenScreenOrientation_h
 #define ScreenScreenOrientation_h
 
 #include "platform/Supplementable.h"
+#include "platform/heap/Handle.h"
 
 namespace blink {
 
 class ScreenOrientation;
 class Screen;
 class ScriptState;
 
-class ScreenScreenOrientation final
-    : public NoBaseWillBeGarbageCollectedFinalized<ScreenScreenOrientation>
-    , public WillBeHeapSupplement<Screen> {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(ScreenScreenOrientation);
+class ScreenScreenOrientation final : public GarbageCollected<ScreenScreenOrientation>, public HeapSupplement<Screen> {
+    USING_GARBAGE_COLLECTED_MIXIN(ScreenScreenOrientation);
 public:
     static ScreenScreenOrientation& from(Screen&);
-    virtual ~ScreenScreenOrientation();
 
     static ScreenOrientation* orientation(ScriptState*, Screen&);
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     static const char* supplementName();
 
-    PersistentWillBeMember<ScreenOrientation> m_orientation;
+    Member<ScreenOrientation> m_orientation;
 };
 
 } // namespace blink
 
 #endif // ScreenScreenOrientation_h