Make *some* version of the Win GN build work.

crypto/BUILD.gn

 # Copyright (c) 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.
 
 import("//build/config/crypto.gni")
 
 component("crypto") {
   output_name = "crcrypto"  # Avoid colliding with OpenSSL's libcrypto.
   sources = [
     "apple_keychain.h",
@@ skipping 150 matching lines @@
       "secure_hash_openssl.cc",
       "signature_creator_openssl.cc",
       "signature_verifier_openssl.cc",
       "symmetric_key_openssl.cc",
     ]
   }
 
   defines = [ "CRYPTO_IMPLEMENTATION" ]
 }
 
-if (is_win) {
+if (false && is_win) {
   # A minimal crypto subset for hmac-related stuff that small standalone
   # targets can use to reduce code size on Windows. This does not depend on
   # OpenSSL/NSS but will use Windows APIs for that functionality.
   source_set("crypto_minimal_win") {
     sources = [
       "crypto_export.h",
       "hmac.cc",
       "hmac.h",
       "hmac_win.cc",
       "scoped_capi_types.h",
       "scoped_nss_types.h",
       "secure_util.cc",
       "secure_util.h",
       "symmetric_key.h",
       "symmetric_key_win.cc",
       "third_party/nss/chromium-blapi.h",
       "third_party/nss/chromium-sha256.h",
       "third_party/nss/sha512.cc",
     ]
 
     deps = [
       "//base",
       "//base/third_party/dynamic_annotations",
     ]
 
     defines = [ "CRYPTO_IMPLEMENTATION" ]
   }
 }
 
+if (!is_win) {
 test("crypto_unittests") {
   sources = [
     # Tests.
     "curve25519_unittest.cc",
     "ec_private_key_unittest.cc",
     "ec_signature_creator_unittest.cc",
     "encryptor_unittest.cc",
     "ghash_unittest.cc",
     "hkdf_unittest.cc",
     "hmac_unittest.cc",
@@ skipping 27 matching lines @@
     ":crypto",
     ":platform",
     ":test_support",
     "//base",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }
+}
 
 source_set("test_support") {
   sources = [
     "scoped_test_nss_db.cc",
     "scoped_test_nss_db.h",
     "scoped_test_nss_chromeos_user.cc",
     "scoped_test_nss_chromeos_user.h",
     "scoped_test_system_nss_key_slot.cc",
     "scoped_test_system_nss_key_slot.h",
   ]
@@ skipping 44 matching lines @@
       ]
     } else {
       # Non-Linux platforms use the hermetic NSS from the tree.
       deps += [
         "//third_party/nss:nspr",
         "//third_party/nss:nss",
       ]
     }
   }
 }