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

content/child/webcrypto/webcrypto_impl.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/webcrypto_impl.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 220 matching lines @@
                  unsigned int key_data_size,
                  const blink::WebCryptoAlgorithm& algorithm,
                  bool extractable,
                  blink::WebCryptoKeyUsageMask usage_mask,
                  const blink::WebCryptoResult& result)
       : BaseState(result),
         format(format),
         key_data(key_data, key_data + key_data_size),
         algorithm(algorithm),
         extractable(extractable),
-        usage_mask(usage_mask),
-        key(blink::WebCryptoKey::createNull()) {}
+        usage_mask(usage_mask) {}
 
   const blink::WebCryptoKeyFormat format;
   const std::vector<uint8_t> key_data;
   const blink::WebCryptoAlgorithm algorithm;
   const bool extractable;
   const blink::WebCryptoKeyUsageMask usage_mask;
 
   blink::WebCryptoKey key;
 };
 
@@ skipping 64 matching lines @@
                  bool extractable,
                  blink::WebCryptoKeyUsageMask usages,
                  const blink::WebCryptoResult& result)
       : BaseState(result),
         format(format),
         wrapped_key(wrapped_key, wrapped_key + wrapped_key_size),
         wrapping_key(wrapping_key),
         unwrap_algorithm(unwrap_algorithm),
         unwrapped_key_algorithm(unwrapped_key_algorithm),
         extractable(extractable),
-        usages(usages),
-        unwrapped_key(blink::WebCryptoKey::createNull()) {}
+        usages(usages) {}
 
   const blink::WebCryptoKeyFormat format;
   const std::vector<uint8_t> wrapped_key;
   const blink::WebCryptoKey wrapping_key;
   const blink::WebCryptoAlgorithm unwrap_algorithm;
   const blink::WebCryptoAlgorithm unwrapped_key_algorithm;
   const bool extractable;
   const blink::WebCryptoKeyUsageMask usages;
 
   blink::WebCryptoKey unwrapped_key;
@@ skipping 386 matching lines @@
       &key);
 }
 
 bool WebCryptoImpl::serializeKeyForClone(
     const blink::WebCryptoKey& key,
     blink::WebVector<unsigned char>& key_data) {
   return webcrypto::SerializeKeyForClone(key, &key_data);
 }
 
 }  // namespace content