[webcrypto] Add JWK symmetric key AES-KW unwrap for NSS.

content/child/webcrypto/jwk.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 #include <functional>
 #include <map>
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/lazy_instance.h"
@@ skipping 373 matching lines @@
 }  // namespace
 
 Status ImportKeyJwk(const CryptoData& key_data,
                     const blink::WebCryptoAlgorithm& algorithm_or_null,
                     bool extractable,
                     blink::WebCryptoKeyUsageMask usage_mask,
                     blink::WebCryptoKey* key) {
   // TODO(padolph): Generalize this comment to include export, and move to top
   // of file.
 
+  // TODO(padolph): Generalize this comment to include export, and move to top
+  // of file.
+
   // The goal of this method is to extract key material and meta data from the
   // incoming JWK, combine them with the input parameters, and ultimately import
   // a Web Crypto Key.
   //
   // JSON Web Key Format (JWK)
   // http://tools.ietf.org/html/draft-ietf-jose-json-web-key-21
   //
   // A JWK is a simple JSON dictionary with the following entries
   // - "kty" (Key Type) Parameter, REQUIRED
   // - <kty-specific parameters, see below>, REQUIRED
@@ skipping 359 matching lines @@
   std::string json;
   base::JSONWriter::Write(&jwk_dict, &json);
   *buffer = CreateArrayBuffer(reinterpret_cast<const uint8*>(json.data()),
                               json.size());
   return Status::Success();
 }
 
 }  // namespace webcrypto
 
 }  // namespace content