Implement HKDF for webcrypto

content/child/webcrypto/nss/util_nss.cc

Index: content/child/webcrypto/nss/util_nss.cc
diff --git a/content/child/webcrypto/nss/util_nss.cc b/content/child/webcrypto/nss/util_nss.cc
index aa1aa65580ca364a4c5a32a6e8f09f8ad9c00ce5..a66ac9e059f96bcc9e163528d1708e3fa5bfca60 100644
--- a/content/child/webcrypto/nss/util_nss.cc
+++ b/content/child/webcrypto/nss/util_nss.cc
@@ -101,6 +101,11 @@ AlgorithmImplementation* CreatePlatformEcdhImplementation() {
   return NULL;
 }
 
+AlgorithmImplementation* CreatePlatformHkdfImplementation() {
+  // HKDF is only being imlemented for boringssl.

[eroman, 2015/01/08 02:39:43]

BoringSSL is how it is referred to elsewhere in code I believe.

[nharper, 2015/01/09 18:35:55]

Done. That's how it's capitalized in the rest of the code.

+  return NULL;
+}
+
 }  // namespace webcrypto
 
 }  // namespace content