Have ScriptPromiseResolver on the Oilpan heap always.

Source/platform/CryptoResult.h

Index: Source/platform/CryptoResult.h
diff --git a/Source/platform/CryptoResult.h b/Source/platform/CryptoResult.h
index 5f3b9cd5dce6a9014ef81247f7c042805bdd0e6c..302fb56c7972a4a8f2aacd838e90662049515e8d 100644
--- a/Source/platform/CryptoResult.h
+++ b/Source/platform/CryptoResult.h
@@ -46,7 +46,7 @@ public:
 };
 
 // Receives notification of completion of the crypto operation.
-class CryptoResult : public ThreadSafeRefCountedWillBeGarbageCollectedFinalized<CryptoResult> {
+class CryptoResult : public GarbageCollectedFinalized<CryptoResult> {
 public:
     virtual ~CryptoResult() { }