[refactor] More post-NSS WebCrypto cleanups (utility functions).

components/webcrypto/algorithms/test_helpers.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_TEST_HELPERS_H_
 #define COMPONENTS_WEBCRYPTO_ALGORITHMS_TEST_HELPERS_H_
 
 #include <ostream>
 #include <string>
 #include <vector>
@@ skipping 188 matching lines @@
 // Extracts the key data bytes from |test| as used insome JSON test files.
 std::vector<uint8_t> GetKeyDataFromJsonTestCase(
     const base::DictionaryValue* test,
     blink::WebCryptoKeyFormat key_format);
 
 // Reads the "crv" string from a JSON test case and returns it as a
 // WebCryptoNamedCurve.
 blink::WebCryptoNamedCurve GetCurveNameFromDictionary(
     const base::DictionaryValue* dict);
 
+// Creates an HMAC import algorithm whose inner hash algorithm is determined by
+// the specified algorithm ID. It is an error to call this method with a hash
+// algorithm that is not SHA*.
+blink::WebCryptoAlgorithm CreateHmacImportAlgorithm(
+    blink::WebCryptoAlgorithmId hash_id,
+    unsigned int length_bits);
+
+// Same as above but without specifying a length.
+blink::WebCryptoAlgorithm CreateHmacImportAlgorithmNoLength(
+    blink::WebCryptoAlgorithmId hash_id);
+
 }  // namespace webcrypto
 
 #endif  // COMPONENTS_WEBCRYPTO_ALGORITHMS_TEST_HELPERS_H_