Oilpan: have Navigator plugin objects on the heap by default.

Source/modules/plugins/DOMMimeTypeArray.h

 /*
     Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
     Copyright (C) 2008 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
@@ skipping 16 matching lines @@
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
 class LocalFrame;
 class PluginData;
 
-class DOMMimeTypeArray final : public RefCountedWillBeGarbageCollected<DOMMimeTypeArray>, public ScriptWrappable, public DOMWindowProperty {
+class DOMMimeTypeArray final : public GarbageCollectedFinalized<DOMMimeTypeArray>, public ScriptWrappable, public DOMWindowProperty {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DOMMimeTypeArray);
 public:
-    static PassRefPtrWillBeRawPtr<DOMMimeTypeArray> create(LocalFrame* frame)
+    static DOMMimeTypeArray* create(LocalFrame* frame)
     {
-        return adoptRefWillBeNoop(new DOMMimeTypeArray(frame));
+        return new DOMMimeTypeArray(frame);
     }
 
     unsigned length() const;
-    PassRefPtrWillBeRawPtr<DOMMimeType> item(unsigned index);
-    PassRefPtrWillBeRawPtr<DOMMimeType> namedItem(const AtomicString& propertyName);
+    DOMMimeType* item(unsigned index);
+    DOMMimeType* namedItem(const AtomicString& propertyName);
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit DOMMimeTypeArray(LocalFrame*);
     PluginData* getPluginData() const;
 };
 
 } // namespace blink
 
-#endif // MimeTypeArray_h
+#endif // DOMMimeTypeArray_h