WebCrypto: Add WebKit API structure for keys.

Source/modules/crypto/Key.h

Index: Source/modules/crypto/Key.h
diff --git a/Source/modules/crypto/WorkerCrypto.h b/Source/modules/crypto/Key.h
similarity index 76%
copy from Source/modules/crypto/WorkerCrypto.h
copy to Source/modules/crypto/Key.h
index 5bbb3f5d39eba918f40aab6f91439d3993547e81..a022802ae28068d20ecec5c3570481542050f72b 100644
--- a/Source/modules/crypto/WorkerCrypto.h
+++ b/Source/modules/crypto/Key.h
@@ -28,26 +28,35 @@
  * 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