Implement HKDF for webcrypto

content/content_child.gypi

 # Copyright 2013 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../mojo/mojo_base.gyp:mojo_environment_chromium',
     '../mojo/mojo_base.gyp:mojo_common_lib',
@@ skipping 286 matching lines @@
     'webcrypto_openssl_sources': [
       'child/webcrypto/openssl/aes_cbc_openssl.cc',
       'child/webcrypto/openssl/aes_ctr_openssl.cc',
       'child/webcrypto/openssl/aes_gcm_openssl.cc',
       'child/webcrypto/openssl/aes_key_openssl.cc',
       'child/webcrypto/openssl/aes_key_openssl.h',
       'child/webcrypto/openssl/aes_kw_openssl.cc',
       'child/webcrypto/openssl/ec_key_openssl.cc',
       'child/webcrypto/openssl/ecdh_openssl.cc',
       'child/webcrypto/openssl/ecdsa_openssl.cc',
+      'child/webcrypto/openssl/hkdf_openssl.cc',
       'child/webcrypto/openssl/hmac_openssl.cc',
       'child/webcrypto/openssl/key_openssl.cc',
       'child/webcrypto/openssl/key_openssl.h',
       'child/webcrypto/openssl/rsa_key_openssl.cc',
       'child/webcrypto/openssl/rsa_key_openssl.h',
       'child/webcrypto/openssl/rsa_oaep_openssl.cc',
       'child/webcrypto/openssl/rsa_pss_openssl.cc',
       'child/webcrypto/openssl/rsa_sign_openssl.cc',
       'child/webcrypto/openssl/rsa_sign_openssl.h',
       'child/webcrypto/openssl/rsa_ssa_openssl.cc',
@@ skipping 76 matching lines @@
         }, {
           'dependencies': [
             '../third_party/nss/nss.gyp:nspr',
             '../third_party/nss/nss.gyp:nss',
           ],
         }],
       ],
     }],
   ],
 }