Allow a crypto::RSAPrivateKey object to be wrapped round a pre-existing

crypto/rsa_private_key.h

Index: crypto/rsa_private_key.h
diff --git a/crypto/rsa_private_key.h b/crypto/rsa_private_key.h
index cb190677b166641443229012d5fa7379eb384806..2eb93ee80dba88b4f66e1915d3455f8f3c8539e2 100644
--- a/crypto/rsa_private_key.h
+++ b/crypto/rsa_private_key.h
@@ -216,6 +216,11 @@ class CRYPTO_EXPORT RSAPrivateKey {
   static RSAPrivateKey* FindFromPublicKeyInfoInSlot(
       const std::vector<uint8>& input,
       PK11SlotInfo* slot);
+#elif defined(USE_OPENSSL)
+  // Create a new instance by referencing an existing private key
+  // structure.  Does not import the key.

[davidben, 2014/09/09 18:28:57]

Nit: What does "Does not import the key" mean in this context? I'm guessing this
is from the NSS one? I would maybe replace that with:

// Create a new instance from an existing EVP_PKEY, taking a
// reference to it. |key| must be an RSA key. Returns NULL on
// failure.

[dougsteed, 2014/09/09 21:05:47]

Done.

+  static RSAPrivateKey* CreateFromKey(EVP_PKEY* key);
+
 #endif
 
 #if defined(USE_OPENSSL)