WebCrypto: Add the KeyPair 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 51 matching lines @@
     {
         assign(o);
         return *this;
     }
 
     WEBKIT_EXPORT void completeWithError();
     WEBKIT_EXPORT void completeWithBuffer(const WebArrayBuffer&);
     WEBKIT_EXPORT void completeWithBuffer(const void*, size_t);
     WEBKIT_EXPORT void completeWithBoolean(bool);
     WEBKIT_EXPORT void completeWithKey(const WebCryptoKey&);
+    WEBKIT_EXPORT void completeWithKeyPair(const WebCryptoKey& publicKey, const WebCryptoKey& privateKey);
 
 #if WEBKIT_IMPLEMENTATION
     explicit WebCryptoResult(const WTF::PassRefPtr<WebCore::CryptoResult>&);
 #endif
 
 private:
     WEBKIT_EXPORT void reset();
     WEBKIT_EXPORT void assign(const WebCryptoResult&);
 
     WebPrivatePtr<WebCore::CryptoResult> m_impl;
@@ skipping 19 matching lines @@
     virtual void generateKey(const WebCryptoAlgorithm&, bool extractable, WebCryptoKeyUsageMask, WebCryptoResult) { WEBKIT_ASSERT_NOT_REACHED(); }
     virtual void importKey(WebCryptoKeyFormat, const unsigned char* keyData, size_t keyDataSize, const WebCryptoAlgorithm&, bool extractable, WebCryptoKeyUsageMask, WebCryptoResult) { WEBKIT_ASSERT_NOT_REACHED(); }
 
 protected:
     virtual ~WebCrypto() { }
 };
 
 } // namespace WebKit
 
 #endif