[webcrypto] Add the KeyAlgorithm interface.

Source/modules/crypto/KeyAlgorithm.h

Index: Source/modules/crypto/KeyAlgorithm.h
diff --git a/Source/modules/crypto/Algorithm.h b/Source/modules/crypto/KeyAlgorithm.h
similarity index 66%
rename from Source/modules/crypto/Algorithm.h
rename to Source/modules/crypto/KeyAlgorithm.h
index b71e875ac6aaa9193931f60549e24053c446a380..81c292321b225bd1dbee7842e8a2aed50bb98c1b 100644
--- a/Source/modules/crypto/Algorithm.h
+++ b/Source/modules/crypto/KeyAlgorithm.h
@@ -28,34 +28,44 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef Algorithm_h
-#define Algorithm_h
+#ifndef KeyAlgorithm_h
+#define KeyAlgorithm_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "heap/Handle.h"
-#include "public/platform/WebCryptoAlgorithm.h"
+#include "public/platform/WebCryptoKeyAlgorithm.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
-class Algorithm : public RefCountedWillBeGarbageCollectedFinalized<Algorithm>, public ScriptWrappable {
+class KeyAlgorithm : public RefCountedWillBeGarbageCollectedFinalized<KeyAlgorithm>, public ScriptWrappable {
 public:
-    static PassRefPtrWillBeRawPtr<Algorithm> create(const blink::WebCryptoAlgorithm&);
+    virtual ~KeyAlgorithm();
+
+    static PassRefPtrWillBeRawPtr<KeyAlgorithm> create(const blink::WebCryptoKeyAlgorithm&);
+    static PassRefPtrWillBeRawPtr<KeyAlgorithm> createHash(const blink::WebCryptoAlgorithm&);
 
     String name();
 
-    blink::WebCryptoAlgorithmParamsType type() const { return m_algorithm.paramsType(); }
+    // Needed by SpecialWrapFor and for casting.
+    bool isAesKeyAlgorithm() const;
+    bool isHmacKeyAlgorithm() const;
+    bool isRsaHashedKeyAlgorithm() const;
+    bool isRsaKeyAlgorithm() const;
 
-    void trace(Visitor*) { }
+    virtual void trace(Visitor*);
 
 protected:
-    explicit Algorithm(const blink::WebCryptoAlgorithm&);
+    explicit KeyAlgorithm(const blink::WebCryptoKeyAlgorithm&);
 
-    const blink::WebCryptoAlgorithm m_algorithm;
+    blink::WebCryptoKeyAlgorithm m_algorithm;
 };
 
+#define DEFINE_KEY_ALGORITHM_TYPE_CASTS(thisType) \
+    DEFINE_TYPE_CASTS(thisType, KeyAlgorithm, value, value->is##thisType(), value.is##thisType())
+
 } // namespace WebCore
 
 #endif