[webcrypto] JWK: Updated import(ext, key_ops) and added export of symmetric keys

content/renderer/webcrypto/platform_crypto_nss.cc

Index: content/renderer/webcrypto/platform_crypto_nss.cc
diff --git a/content/renderer/webcrypto/platform_crypto_nss.cc b/content/renderer/webcrypto/platform_crypto_nss.cc
index 5874e244af2d84e81871832c2cf83151e35a3d31..dad547e8b6870f4b3d69ddef765997b2185d8d15 100644
--- a/content/renderer/webcrypto/platform_crypto_nss.cc
+++ b/content/renderer/webcrypto/platform_crypto_nss.cc
@@ -1190,10 +1190,14 @@ Status UnwrapSymKeyAesKw(const CryptoData& wrapped_key_data,
   if (!unwrapped_key)
     return Status::Error();
 
+  blink::WebCryptoKeyAlgorithm key_algorithm;
+  if (!CreateSecretKeyAlgorithm(algorithm, plaintext_length, &key_algorithm))
+    return Status::ErrorUnexpected();
+
   *key = blink::WebCryptoKey::create(new SymKey(unwrapped_key.Pass()),
                                      blink::WebCryptoKeyTypeSecret,
                                      extractable,
-                                     algorithm,
+                                     key_algorithm,

[eroman, 2014/03/04 02:55:14]

Not sure I understand this change --> wouldn't it have failed compile without
this?

Is this change an artifact of basing on an uncommitted git branch?

(The change itself looks good, just trying to understand why it is here)

[padolph, 2014/03/04 17:38:20]

Yes, it's an artifact of my workflow. This is a fix for a compile bug from
another git branch, upon which this branch is based. Sorry for the confusion.

                                      usage_mask);
   return Status::Success();
 }