[webcrypto] Add key generation for AES-GCM and AES-KW for NSS.

content/renderer/webcrypto/webcrypto_util.cc

Index: content/renderer/webcrypto/webcrypto_util.cc
diff --git a/content/renderer/webcrypto/webcrypto_util.cc b/content/renderer/webcrypto/webcrypto_util.cc
index 977c282c63b72230c52704bb74a9691d04ee0eec..05f1f2f0961bbdf1f995eacc4d92ea9c0e4a84e4 100644
--- a/content/renderer/webcrypto/webcrypto_util.cc
+++ b/content/renderer/webcrypto/webcrypto_util.cc
@@ -172,6 +172,12 @@ blink::WebCryptoAlgorithm CreateAesGcmKeyGenAlgorithm(
                                   key_length_bits);
 }
 
+blink::WebCryptoAlgorithm CreateAesKwKeyGenAlgorithm(

[eroman, 2013/12/20 01:28:16]

I don't think this should go in the webcrypto_util.h.

I see webcrypto_util.h as functions which are used by non-test code (for
instance NSS implementation and OpenSSL implementation, or test code + non-test
code).

If something is purely for test it should just go in the _unittest.cc file.

Otherwise we are relying on the linker to strip dead code (it probably will, but
good hygiene not to include unnecessary functions in the release build of
browser).

[padolph, 2013/12/20 02:03:00]

Done.

+    unsigned short key_length_bits) {
+  return CreateAesKeyGenAlgorithm(blink::WebCryptoAlgorithmIdAesKw,
+                                  key_length_bits);
+}
+
 }  // namespace webcrypto
 
 }  // namespace content