Enable Oilpan for core/timing/.

Source/core/timing/PerformanceMeasure.h

Index: Source/core/timing/PerformanceMeasure.h
diff --git a/Source/core/timing/PerformanceMeasure.h b/Source/core/timing/PerformanceMeasure.h
index fd40589396ad0e3eb6b6dc8a9aa28cf36c39634f..d384d77be4df90792870324986d62ee3a9202b48 100644
--- a/Source/core/timing/PerformanceMeasure.h
+++ b/Source/core/timing/PerformanceMeasure.h
@@ -36,9 +36,9 @@ namespace blink {
 class PerformanceMeasure final : public PerformanceEntry {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<PerformanceMeasure> create(const String& name, double startTime, double endTime)
+    static PerformanceMeasure* create(const String& name, double startTime, double endTime)
     {
-        return adoptRefWillBeNoop(new PerformanceMeasure(name, startTime, endTime));
+        return new PerformanceMeasure(name, startTime, endTime);
     }
 
     virtual bool isMeasure() override { return true; }