Enable Oilpan for core/timing/.

Source/core/timing/PerformanceMark.h

Index: Source/core/timing/PerformanceMark.h
diff --git a/Source/core/timing/PerformanceMark.h b/Source/core/timing/PerformanceMark.h
index 9012dd04ebd02a0a241122b57cbc84753e496914..5cc698671bd9d1b7cd66133fde6051644fae6c8f 100644
--- a/Source/core/timing/PerformanceMark.h
+++ b/Source/core/timing/PerformanceMark.h
@@ -28,7 +28,6 @@
 
 #include "core/timing/PerformanceEntry.h"
 #include "platform/heap/Handle.h"
-#include "wtf/PassRefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
@@ -36,9 +35,9 @@ 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; }