Introduce Promise mapping to the IDL generator

Source/modules/crypto/CryptoResult.h

Index: Source/modules/crypto/CryptoResult.h
diff --git a/Source/modules/crypto/CryptoResult.h b/Source/modules/crypto/CryptoResult.h
index 373a173295e49990d530e4760eee8496a01d1093..e54efcc81e58a3966ac3207e9aab6e3b88af56d8 100644
--- a/Source/modules/crypto/CryptoResult.h
+++ b/Source/modules/crypto/CryptoResult.h
@@ -31,15 +31,14 @@
 #ifndef CryptoResult_h
 #define CryptoResult_h
 
-#include "bindings/v8/ScriptObject.h"
+#include "bindings/v8/ScriptPromise.h"
+#include "bindings/v8/ScriptPromiseResolver.h"
 #include "public/platform/WebCrypto.h"
 #include "wtf/Forward.h"
 #include "wtf/ThreadSafeRefCounted.h"
 
 namespace WebCore {
 
-class ScriptPromiseResolver;
-
 // Wrapper around a Promise to notify completion of the crypto operation.
 class CryptoResult : public ThreadSafeRefCounted<CryptoResult> {
 public:
@@ -58,13 +57,13 @@ public:
         return WebKit::WebCryptoResult(this);
     }
 
-    ScriptObject promise();
+    ScriptPromise promise();
 
 private:
     CryptoResult();
     void finish();
 
-    RefPtr<ScriptPromiseResolver> m_promiseResolver;
+    ScriptPromiseResolver m_promiseResolver;
     bool m_finished;
 };