WebCrypto: Add WebKit API structure for keys.

Source/modules/crypto/Algorithm.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 21 matching lines @@
 #define Algorithm_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "public/platform/WebCryptoAlgorithm.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
-typedef int ExceptionCode;
-
 class Algorithm : public ScriptWrappable, public RefCounted<Algorithm> {
 public:
-    static PassRefPtr<Algorithm> create(const WebKit::WebCryptoAlgorithm& algorithm) { return adoptRef(new Algorithm(algorithm)); }
+    static PassRefPtr<Algorithm> create(const WebKit::WebCryptoAlgorithm&);
 
-    const String& name();
+    String name();
 
     WebKit::WebCryptoAlgorithmParamsType type() const { return m_algorithm.paramsType(); }
 
 protected:
     explicit Algorithm(const WebKit::WebCryptoAlgorithm&);
 
     const WebKit::WebCryptoAlgorithm m_algorithm;
-    String m_name;
 };
 
 } // namespace WebCore
 
 #endif