[webcrypto] Replace KeyAlgorithm interfaces with an Object.

Source/modules/crypto/CryptoKey.h

 /*
  * 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 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef CryptoKey_h
 #define CryptoKey_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "modules/crypto/NormalizeAlgorithm.h"
 #include "platform/heap/Handle.h"
-#include "public/platform/WebCryptoAlgorithm.h"
 #include "public/platform/WebCryptoKey.h"
 #include "wtf/Forward.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class CryptoResult;
 class KeyAlgorithm;
 
 class CryptoKey : public GarbageCollectedFinalized<CryptoKey>, public ScriptWrappable {
 public:
     static CryptoKey* create(const blink::WebCryptoKey& key)
     {
         return new CryptoKey(key);
     }
 
     ~CryptoKey();
 
     String type() const;
     bool extractable() const;
-    KeyAlgorithm* algorithm();
     Vector<String> usages() const;
 
     const blink::WebCryptoKey& key() const { return m_key; }
 
     // If the key cannot be used with the indicated algorithm, returns false
     // and completes the CryptoResult with an error.
     bool canBeUsedForAlgorithm(const blink::WebCryptoAlgorithm&, blink::WebCryptoOperation, CryptoResult*) const;
 
     // On failure, these return false and complete the CryptoResult with an error.
     static bool parseFormat(const String&, blink::WebCryptoKeyFormat&, CryptoResult*);
     static bool parseUsageMask(const Vector<String>&, blink::WebCryptoKeyUsageMask&, CryptoResult*);
 
-    void trace(Visitor*);
+    void trace(Visitor*) { }
 
 protected:
     explicit CryptoKey(const blink::WebCryptoKey&);
 
     const blink::WebCryptoKey m_key;
-    Member<KeyAlgorithm> m_algorithm;
 };
 
 } // namespace WebCore
 
 #endif