Partially revert "Fix stack-overflow when dealing with blobURL(s)"

https://bugs.webkit.org/show_bug.cgi?id=262777

The code change here is incompatible with some other commit, most likely
266247@main. We can still keep the new test, though.

This fixes Unity WebGL applications.

* Source/WebCore/fileapi/BlobURL.cpp:
(WebCore::BlobURL::isSecureBlobURL):

Source/WebCore/fileapi/BlobURL.cpp

@@ -81,7 +81,7 @@ bool BlobURL::isSecureBlobURL(const URL& url)
             return document->isSecureContext();
     }
 
-    return false;
+    return SecurityOrigin::isSecure(getOriginURL(url));
 }
 
 URL BlobURL::createBlobURL(StringView originString)