[webcrypto] Add raw symmetric key RSAES-PKCS1-v1_5 wrap/unwrap for NSS.

content/child/webcrypto/platform_crypto.h

Index: content/child/webcrypto/platform_crypto.h
diff --git a/content/child/webcrypto/platform_crypto.h b/content/child/webcrypto/platform_crypto.h
index 1af616681996551e70a0dd2ca6e0545ac1f36f6e..340c258ee8dc9328ffec683ff0509c5d4897511d 100644
--- a/content/child/webcrypto/platform_crypto.h
+++ b/content/child/webcrypto/platform_crypto.h
@@ -186,8 +186,8 @@ Status WrapSymKeyAesKw(SymKey* wrapping_key,
 // Preconditions:
 //  * |wrapping_key| is non-null
 //  * |key| is non-null
-//  * |algorithm.id()| is for a symmetric key algorithm.
 //  * |wrapped_key_data| is at least 24 bytes and a multiple of 8 bytes
+//  * |algorithm.id()| is for a symmetric key algorithm.
 Status UnwrapSymKeyAesKw(const CryptoData& wrapped_key_data,
                          SymKey* wrapping_key,
                          const blink::WebCryptoAlgorithm& algorithm,
@@ -195,6 +195,24 @@ Status UnwrapSymKeyAesKw(const CryptoData& wrapped_key_data,
                          blink::WebCryptoKeyUsageMask usage_mask,
                          blink::WebCryptoKey* key);
 
+// Preconditions:
+//  * |wrapping_key| is non-null
+//  * |key| is non-null
+Status WrapSymKeyRsaEs(PublicKey* wrapping_key,
+                       SymKey* key,
+                       blink::WebArrayBuffer* buffer);
+
+// Preconditions:
+//  * |wrapping_key| is non-null
+//  * |key| is non-null
+//  * |algorithm.id()| is for a symmetric key algorithm.
+Status UnwrapSymKeyRsaEs(const CryptoData& wrapped_key_data,
+                         PrivateKey* wrapping_key,
+                         const blink::WebCryptoAlgorithm& algorithm,
+                         bool extractable,
+                         blink::WebCryptoKeyUsageMask usage_mask,
+                         blink::WebCryptoKey* key);
+
 }  // namespace platform
 
 }  // namespace webcrypto