Cleanup: Use default constructor for WebCryptoKey rather than createNull() factory method.

content/child/webcrypto/test/test_helpers.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 "content/child/webcrypto/test/test_helpers.h"
 
 #include <algorithm>
 
 #include "base/files/file_util.h"
 #include "base/json/json_reader.h"
@@ skipping 57 matching lines @@
          memcmp(a.bytes(), b.bytes(), a.byte_length()) == 0;
 }
 
 bool operator!=(const CryptoData& a, const CryptoData& b) {
   return !(a == b);
 }
 
 bool SupportsAesGcm() {
   std::vector<uint8_t> key_raw(16, 0);
 
-  blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
+  blink::WebCryptoKey key;
   Status status = ImportKey(blink::WebCryptoKeyFormatRaw,
                             CryptoData(key_raw),
                             CreateAlgorithm(blink::WebCryptoAlgorithmIdAesGcm),
                             true,
                             blink::WebCryptoKeyUsageEncrypt,
                             &key);
 
   if (status.IsError())
     EXPECT_EQ(blink::WebCryptoErrorTypeNotSupported, status.error_type());
   return status.IsSuccess();
@@ skipping 230 matching lines @@
     "A56E4A0E701017589A5187DC7EA841D156F2EC0E36AD52A44DFEB1E61F7AD991D8C51056"
     "FFEDB162B4C0F283A12A88A394DFF526AB7291CBB307CEABFCE0B1DFD5CD9508096D5B2B"
     "8B6DF5D671EF6377C0921CB23C270A70E2598E6FF89D19F105ACC2D3F0CB35F29280E138"
     "6B6F64C4EF22E1E1F20D0CE8CFFB2249BD9A2137";
 const char* const kPublicKeyExponentHex = "010001";
 
 blink::WebCryptoKey ImportSecretKeyFromRaw(
     const std::vector<uint8_t>& key_raw,
     const blink::WebCryptoAlgorithm& algorithm,
     blink::WebCryptoKeyUsageMask usage) {
-  blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
+  blink::WebCryptoKey key;
   bool extractable = true;
   EXPECT_EQ(Status::Success(),
             ImportKey(blink::WebCryptoKeyFormatRaw,
                       CryptoData(key_raw),
                       algorithm,
                       extractable,
                       usage,
                       &key));
 
   EXPECT_FALSE(key.isNull());
@@ skipping 273 matching lines @@
 
   *public_key = result.public_key();
   *private_key = result.private_key();
 
   return Status::Success();
 }
 
 }  // namespace webcrypto
 
 }  // namesapce content