Oilpan: move core/fileapi to oilpan's heap.

Source/modules/serviceworkers/ServiceWorkerError.h

Index: Source/modules/serviceworkers/ServiceWorkerError.h
diff --git a/Source/modules/serviceworkers/ServiceWorkerError.h b/Source/modules/serviceworkers/ServiceWorkerError.h
index 276eb1348817cfa2b069e2aa4b2f3d61d10b7781..130b834eaa7c4cdad943ec3571197b190adfede0 100644
--- a/Source/modules/serviceworkers/ServiceWorkerError.h
+++ b/Source/modules/serviceworkers/ServiceWorkerError.h
@@ -32,6 +32,7 @@
 #define ServiceWorkerError_h
 
 #include "core/dom/DOMError.h"
+#include "heap/Handle.h"
 #include "public/platform/WebServiceWorkerError.h"
 #include "wtf/PassOwnPtr.h"
 
@@ -41,10 +42,10 @@ class ServiceWorkerError {
 public:
     // For CallbackPromiseAdapter
     typedef blink::WebServiceWorkerError WebType;
-    static PassRefPtr<DOMError> from(WebType* webErrorRaw)
+    static PassRefPtrWillBeRawPtr<DOMError> from(WebType* webErrorRaw)
     {
         OwnPtr<WebType> webError = adoptPtr(webErrorRaw);
-        RefPtr<DOMError> error = DOMError::create(errorString(webError->errorType), webError->message);
+        RefPtrWillBeRawPtr<DOMError> error = DOMError::create(errorString(webError->errorType), webError->message);
         return error.release();
     }