WebCrypto: Add WebKit API structure for keys.

Source/modules/crypto/Key.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 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (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 WorkerCrypto_h
-#define WorkerCrypto_h
+#ifndef Key_h
+#define Key_h
 
 #include "bindings/v8/ScriptWrappable.h"
+#include "public/platform/WebCryptoKey.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
-typedef int ExceptionCode;
+class Algorithm;
 
-class WorkerCrypto : public ScriptWrappable, public RefCounted<WorkerCrypto> {
+class Key : public ScriptWrappable, public RefCounted<Key> {
 public:
-    static PassRefPtr<WorkerCrypto> create() { return adoptRef(new WorkerCrypto()); }
+    static PassRefPtr<Key> create(const WebKit::WebCryptoKey& key) { return adoptRef(new Key(key)); }
 
-private:
-    WorkerCrypto();
+    String type() const;
+    bool extractable() const;
+    Algorithm* algorithm();
+    Vector<String> keyUsage() const;
+
+protected:
+    explicit Key(const WebKit::WebCryptoKey&);
+
+    const WebKit::WebCryptoKey m_key;
+    RefPtr<Algorithm> m_algorithm;
 };
 
-}
+} // namespace WebCore
 
 #endif