WebCrypto: Add framework for AlgorithmIdentifier normalization.

Source/modules/crypto/SubtleCrypto.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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 13 matching lines @@
  * 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 SubtleCrypto_h
 #define SubtleCrypto_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "wtf/Forward.h"
+#include "wtf/HashMap.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
+#include "wtf/text/StringHash.h"
 
 namespace WebCore {
 
+class CryptoOperation;
+class Dictionary;
+
 typedef int ExceptionCode;
 
 class SubtleCrypto : public ScriptWrappable, public RefCounted<SubtleCrypto> {
 public:
     static PassRefPtr<SubtleCrypto> create() { return adoptRef(new SubtleCrypto()); }
 
+    PassRefPtr<CryptoOperation> encrypt(const Dictionary& algorithm, ExceptionCode&);
+    PassRefPtr<CryptoOperation> decrypt(const Dictionary& algorithm, ExceptionCode&);
+    PassRefPtr<CryptoOperation> sign(const Dictionary& algorithm, ExceptionCode&);
+    PassRefPtr<CryptoOperation> verify(const Dictionary& algorithm, ExceptionCode&);
+    PassRefPtr<CryptoOperation> digest(const Dictionary& algorithm, ExceptionCode&);
+
 private:
     SubtleCrypto();
 };
 
-}
+} // namespace WebCore
 
 #endif