[webcrypto] Add support for import/export of "raw" formatted EC keys.

components/webcrypto/algorithms/ec.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_EC_H_
 #define COMPONENTS_WEBCRYPTO_ALGORITHMS_EC_H_
 
 #include <stdint.h>
 
 #include "components/webcrypto/algorithm_implementation.h"
@@ skipping 33 matching lines @@
                    std::vector<uint8_t>* buffer) const override;
 
   Status DeserializeKeyForClone(const blink::WebCryptoKeyAlgorithm& algorithm,
                                 blink::WebCryptoKeyType type,
                                 bool extractable,
                                 blink::WebCryptoKeyUsageMask usages,
                                 const CryptoData& key_data,
                                 blink::WebCryptoKey* key) const override;
 
  private:
+  Status ImportKeyRaw(const CryptoData& key_data,
+                      const blink::WebCryptoAlgorithm& algorithm,
+                      bool extractable,
+                      blink::WebCryptoKeyUsageMask usages,
+                      blink::WebCryptoKey* key) const;
+
   Status ImportKeyPkcs8(const CryptoData& key_data,
                         const blink::WebCryptoAlgorithm& algorithm,
                         bool extractable,
                         blink::WebCryptoKeyUsageMask usages,
                         blink::WebCryptoKey* key) const;
 
   Status ImportKeySpki(const CryptoData& key_data,
                        const blink::WebCryptoAlgorithm& algorithm,
                        bool extractable,
                        blink::WebCryptoKeyUsageMask usages,
                        blink::WebCryptoKey* key) const;
 
   Status ImportKeyJwk(const CryptoData& key_data,
                       const blink::WebCryptoAlgorithm& algorithm,
                       bool extractable,
                       blink::WebCryptoKeyUsageMask usages,
                       blink::WebCryptoKey* key) const;
 
+  Status ExportKeyRaw(const blink::WebCryptoKey& key,
+                      std::vector<uint8_t>* buffer) const;
+
   Status ExportKeyPkcs8(const blink::WebCryptoKey& key,
                         std::vector<uint8_t>* buffer) const;
 
   Status ExportKeySpki(const blink::WebCryptoKey& key,
                        std::vector<uint8_t>* buffer) const;
 
   Status ExportKeyJwk(const blink::WebCryptoKey& key,
                       std::vector<uint8_t>* buffer) const;
 
   const blink::WebCryptoKeyUsageMask all_public_key_usages_;
   const blink::WebCryptoKeyUsageMask all_private_key_usages_;
 };
 
 }  // namespace webcrypto
 
 #endif  // COMPONENTS_WEBCRYPTO_ALGORITHMS_EC_H_