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diff --git a/Source/WTF/wtf/spi/darwin/CommonCryptoSPI.h b/Source/WTF/wtf/spi/darwin/CommonCryptoSPI.h
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+++ b/Source/WTF/wtf/spi/darwin/CommonCryptoSPI.h
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+/*
+ * Copyright (C) 2015-2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef CommonCryptoSPI_h
+#define CommonCryptoSPI_h
+
+#if OS(DARWIN)
+
+#if USE(APPLE_INTERNAL_SDK)
+#include <CommonCrypto/CommonRandomSPI.h>
+#endif
+
+typedef struct __CCRandom* CCRandomRef;
+
+WTF_EXTERN_C_BEGIN
+
+extern const CCRandomRef kCCRandomDefault;
+int CCRandomCopyBytes(CCRandomRef rnd, void *bytes, size_t count);
+
+WTF_EXTERN_C_END
+
+#endif // OS(DARWIN)
+
+#endif /* CommonCryptoSPI_h */