[webcrypto] Add the KeyAlgorithm interface.

public/platform/WebCrypto.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 18 matching lines @@
  */
 
 #ifndef WebCrypto_h
 #define WebCrypto_h
 
 #include "WebCommon.h"
 #include "WebCryptoAlgorithm.h"
 #include "WebCryptoKey.h"
 #include "WebPrivatePtr.h"
 
+// FIXME: Remove this once chromium side is updated.
+#define WEBCRYPTO_HAS_KEY_ALGORITHM 1
+
 namespace WebCore { class CryptoResult; }
 
 #if INSIDE_BLINK
 namespace WTF { template <typename T> class PassRefPtr; }
 #endif
 
 namespace blink {
 
 class WebArrayBuffer;
 class WebString;
@@ skipping 137 matching lines @@
     // and is not part of the WebCrypto standard.
     virtual bool digestSynchronous(const WebCryptoAlgorithmId algorithmId, const unsigned char* data, unsigned dataSize, WebArrayBuffer& result) { return false; }
 
 protected:
     virtual ~WebCrypto() { }
 };
 
 } // namespace blink
 
 #endif