components: Cleanup class/struct fwd declarations

components/webcrypto/algorithms/util.h

 // 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.
 
 #ifndef COMPONENTS_WEBCRYPTO_ALGORITHMS_UTIL_H_
 #define COMPONENTS_WEBCRYPTO_ALGORITHMS_UTIL_H_
 
 #include <string>
 #include <vector>
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h"
 #include "third_party/WebKit/public/platform/WebCryptoKey.h"
 #include "third_party/boringssl/src/include/openssl/base.h"
 
 // This file contains miscellaneous helpers that don't belong in any of the
 // other *_util.h
 
 namespace webcrypto {
 
 class CryptoData;
-class GenerateKeyResult;
 class Status;
 
 // Returns the EVP_MD that corresponds with |hash_algorithm|, or nullptr on
 // failure.
 const EVP_MD* GetDigest(const blink::WebCryptoAlgorithm& hash_algorithm);
 
 // Returns the EVP_MD that corresponds with |id|, or nullptr on failure.
 const EVP_MD* GetDigest(blink::WebCryptoAlgorithmId id);
 
 // Truncates an octet string to a particular bit length. This is accomplished by
@@ skipping 45 matching lines @@
                           const CryptoData& data,
                           unsigned int tag_length_bytes,
                           const CryptoData& iv,
                           const CryptoData& additional_data,
                           const EVP_AEAD* aead_alg,
                           std::vector<uint8_t>* buffer);
 
 }  // namespace webcrypto
 
 #endif  // COMPONENTS_WEBCRYPTO_ALGORITHMS_UTIL_H_