[webcrypto] Refactor some of the algorithm parameter names.

Source/modules/crypto/AesKeyGenParams.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 19 matching lines @@
 
 #include "config.h"
 #include "modules/crypto/AesKeyGenParams.h"
 
 #include "public/platform/WebCryptoAlgorithmParams.h"
 
 namespace WebCore {
 
 unsigned short AesKeyGenParams::length() const
 {
-    return m_algorithm.aesKeyGenParams()->length();
+    return m_algorithm.aesKeyGenParams()->lengthBits();
 }
 
 AesKeyGenParams::AesKeyGenParams(const blink::WebCryptoAlgorithm& algorithm)
     : Algorithm(algorithm)
 {
     ASSERT(algorithm.aesKeyGenParams());
     ScriptWrappable::init(this);
 }
 
 } // namespace WebCore