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

content/renderer/webcrypto/webcrypto_util.h

Index: content/renderer/webcrypto/webcrypto_util.h
diff --git a/content/renderer/webcrypto/webcrypto_util.h b/content/renderer/webcrypto/webcrypto_util.h
index 1c07ed868cc21c9263d0f4b64e009a4d20963a7b..60a851a8a0e03bc37aa7cd764d159acb447bda1b 100644
--- a/content/renderer/webcrypto/webcrypto_util.h
+++ b/content/renderer/webcrypto/webcrypto_util.h
@@ -84,16 +84,6 @@ blink::WebCryptoAlgorithm CreateAesGcmAlgorithm(
     const std::vector<uint8>& additional_data,
     uint8 tag_length_bytes);
 
-// Creates an AES-CBC algorithm whose parameters struct is compatible with key
-// generation.
-CONTENT_EXPORT blink::WebCryptoAlgorithm CreateAesCbcKeyGenAlgorithm(
-    unsigned short key_length_bits);
-
-// Creates an AES-GCM algorithm whose parameters struct is compatible with key
-// generation.
-blink::WebCryptoAlgorithm CreateAesGcmKeyGenAlgorithm(
-    unsigned short key_length_bits);
-
 // Returns the internal block size for SHA-*
 unsigned int ShaBlockSizeBytes(blink::WebCryptoAlgorithmId hash_id);