WebCrypto: Add the KeyPair interface.

Source/modules/crypto/CryptoResult.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 33 matching lines @@
 class CryptoResult : public ThreadSafeRefCounted<CryptoResult> {
 public:
     ~CryptoResult();
 
     static PassRefPtr<CryptoResult> create();
 
     void completeWithError();
     void completeWithBuffer(const WebKit::WebArrayBuffer&);
     void completeWithBoolean(bool);
     void completeWithKey(const WebKit::WebCryptoKey&);
+    void completeWithKeyPair(const WebKit::WebCryptoKey& publicKey, const WebKit::WebCryptoKey& privateKey);
 
     WebKit::WebCryptoResult result()
     {
         return WebKit::WebCryptoResult(this);
     }
 
     ScriptObject promise();
 
 private:
     CryptoResult();
     void finish();
 
     RefPtr<ScriptPromiseResolver> m_promiseResolver;
     bool m_finished;
 };
 
 } // namespace WebCore
 
 #endif