[webcrypto] Implement structured clone of keys (chromium-side).

content/child/webcrypto/webcrypto_impl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_IMPL_H_
 #define CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "third_party/WebKit/public/platform/WebCrypto.h"
@@ skipping 50 matching lines @@
                                const unsigned char* data,
                                unsigned int data_size,
                                blink::WebCryptoResult result);
   // This method synchronously computes a digest for the given data, returning
   // |true| if successful and |false| otherwise.
   virtual bool digestSynchronous(const blink::WebCryptoAlgorithmId algorithm_id,
                                  const unsigned char* data,
                                  unsigned int data_size,
                                  blink::WebArrayBuffer& result);
 
+  virtual bool deserializeKeyForClone(
+      const blink::WebCryptoKeyAlgorithm& algorithm,
+      blink::WebCryptoKeyType type,
+      bool extractable,
+      blink::WebCryptoKeyUsageMask usages,
+      const unsigned char* key_data,
+      unsigned key_data_size,
+      blink::WebCryptoKey& key);
+
+  virtual bool serializeKeyForClone(const blink::WebCryptoKey& key,
+                                    blink::WebVector<unsigned char>& key_data);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(WebCryptoImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEBCRYPTO_WEBCRYPTO_IMPL_H_