Enable Oilpan for core/timing/.

Source/core/timing/PerformanceMark.h

 /*
  * Copyright (C) 2012 Intel 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef PerformanceMark_h
 #define PerformanceMark_h
 
 #include "core/timing/PerformanceEntry.h"
 #include "platform/heap/Handle.h"
-#include "wtf/PassRefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class PerformanceMark final : public PerformanceEntry {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<PerformanceMark> create(const String& name, double startTime)
+    static PerformanceMark* create(const String& name, double startTime)
     {
-        return adoptRefWillBeNoop(new PerformanceMark(name, startTime));
+        return new PerformanceMark(name, startTime);
     }
 
     virtual bool isMark() override { return true; }
 
     DEFINE_INLINE_VIRTUAL_TRACE()
     {
         PerformanceEntry::trace(visitor);
     }
 
 private:
     PerformanceMark(const String& name, double startTime)
         : PerformanceEntry(name, "mark", startTime, startTime) { }
 
     virtual ~PerformanceMark() { }
 };
 
 } // namespace blink
 
 #endif // PerformanceMark_h