[refactor] Remove IsHashAlgorithm() function.

content/child/webcrypto/webcrypto_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 CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_UTIL_H_
 #define CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_UTIL_H_
 
 #include <string>
 #include <vector>
 #include "base/basictypes.h"
@@ skipping 28 matching lines @@
 
 // Composes a Web Crypto usage mask from an array of JWK key_ops values.
 CONTENT_EXPORT Status GetWebCryptoUsagesFromJwkKeyOps(
     const base::ListValue* jwk_key_ops_value,
     blink::WebCryptoKeyUsageMask* jwk_key_ops_mask);
 
 // Composes a JWK key_ops array from a Web Crypto usage mask.
 base::ListValue* CreateJwkKeyOpsFromWebCryptoUsages(
     blink::WebCryptoKeyUsageMask usage_mask);
 
-CONTENT_EXPORT bool IsHashAlgorithm(blink::WebCryptoAlgorithmId alg_id);
-
 // Returns the "hash" param for an algorithm if it exists, otherwise returns
 // a null algorithm.
 blink::WebCryptoAlgorithm GetInnerHashAlgorithm(
     const blink::WebCryptoAlgorithm& algorithm);
 
 // Creates a WebCryptoAlgorithm without any parameters.
 CONTENT_EXPORT blink::WebCryptoAlgorithm CreateAlgorithm(
     blink::WebCryptoAlgorithmId id);
 
 // Creates an HMAC import algorithm whose inner hash algorithm is determined by
@@ skipping 10 matching lines @@
 
 bool CreateSecretKeyAlgorithm(const blink::WebCryptoAlgorithm& algorithm,
                               unsigned int keylen_bytes,
                               blink::WebCryptoKeyAlgorithm* key_algorithm);
 
 }  // namespace webcrypto
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_UTIL_H_