[webcrypto] Change HMAC key generation length from bytes to bits.

Source/modules/crypto/NormalizeAlgorithm.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 459 matching lines @@
         return false;
 
     params = adoptPtr(new blink::WebCryptoHmacImportParams(hash));
     return true;
 }
 
 // Defined by the WebCrypto spec as:
 //
 //    dictionary HmacKeyGenParams : Algorithm {
 //      AlgorithmIdentifier hash;
-//      // The length (in bytes) of the key to generate. If unspecified, the
+//      // The length (in bits) of the key to generate. If unspecified, the
 //      // recommended length will be used, which is the size of the associated hash function's block
 //      // size.
 //      unsigned long length;
 //    };
 bool parseHmacKeyGenParams(const Dictionary& raw, OwnPtr<blink::WebCryptoAlgorithmParams>& params, const ErrorContext& context, String& errorDetails)
 {
     blink::WebCryptoAlgorithm hash;
     if (!parseHash(raw, hash, context, errorDetails))
         return false;
 
@@ skipping 211 matching lines @@
     }
     return true;
 }
 
 const char* algorithmIdToName(blink::WebCryptoAlgorithmId id)
 {
     return AlgorithmRegistry::instance().lookupAlgorithmById(id)->algorithmName;
 }
 
 } // namespace WebCore