Raise an error when calling WebCrypto's deriveBits() for HKDF with

components/webcrypto/status.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_STATUS_H_
 #define COMPONENTS_WEBCRYPTO_STATUS_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 240 matching lines @@
   // The public and private keys given to ECDH key derivation were not for the
   // same named curve.
   static Status ErrorEcdhCurveMismatch();
 
   // The requested bit length for ECDH key derivation was too large.
   static Status ErrorEcdhLengthTooBig(unsigned int max_length_bits);
 
   // The requested length for HKDF was too large.
   static Status ErrorHkdfLengthTooLong();
 
+  // The length to HKDF's deriveBits() was not a multiple of 8.
+  static Status ErrorHkdfLengthNotWholeByte();
+
   // No length parameter was provided for HKDF's Derive Bits operation.
   static Status ErrorHkdfDeriveBitsLengthNotSpecified();
 
   // The requested bit length for PBKDF2 key derivation was invalid.
   static Status ErrorPbkdf2InvalidLength();
 
   // No length parameter was provided for PBKDF2's Derive Bits operation.
   static Status ErrorPbkdf2DeriveBitsLengthNotSpecified();
 
   // PBKDF2's deriveBits() was called with an unsupported length of 0.
@@ skipping 17 matching lines @@
   explicit Status(Type type);
 
   Type type_;
   blink::WebCryptoErrorType error_type_;
   std::string error_details_;
 };
 
 }  // namespace webcrypto
 
 #endif  // COMPONENTS_WEBCRYPTO_STATUS_H_