Oilpan: keep navigation timing objects on the heap by default.

Source/core/timing/PerformanceTiming.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef PerformanceTiming_h
 #define PerformanceTiming_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "core/frame/DOMWindowProperty.h"
 #include "platform/heap/Handle.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
 
 namespace blink {
 
 class DocumentLoadTiming;
 class DocumentLoader;
 class DocumentTiming;
 class LocalFrame;
 class ResourceLoadTiming;
 
-class CORE_EXPORT PerformanceTiming final : public RefCountedWillBeGarbageCollected<PerformanceTiming>, public ScriptWrappable, public DOMWindowProperty {
+class CORE_EXPORT PerformanceTiming final : public GarbageCollectedFinalized<PerformanceTiming>, public ScriptWrappable, public DOMWindowProperty {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PerformanceTiming);
 public:
-    static PassRefPtrWillBeRawPtr<PerformanceTiming> create(LocalFrame* frame)
+    static PerformanceTiming* create(LocalFrame* frame)
     {
-        return adoptRefWillBeNoop(new PerformanceTiming(frame));
+        return new PerformanceTiming(frame);
     }
 
     unsigned long long navigationStart() const;
     unsigned long long unloadEventStart() const;
     unsigned long long unloadEventEnd() const;
     unsigned long long redirectStart() const;
     unsigned long long redirectEnd() const;
     unsigned long long fetchStart() const;
     unsigned long long domainLookupStart() const;
     unsigned long long domainLookupEnd() const;
@@ skipping 21 matching lines @@
 
     const DocumentTiming* documentTiming() const;
     DocumentLoader* documentLoader() const;
     DocumentLoadTiming* documentLoadTiming() const;
     ResourceLoadTiming* resourceLoadTiming() const;
 };
 
 } // namespace blink
 
 #endif // PerformanceTiming_h