Expose a constructor for WebCryptoAlgorithm.

Source/core/platform/chromium/support/WebCryptoAlgorithm.cpp

 /*
  * 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 38 matching lines @@
     WebCryptoAlgorithmId id;
     const char* const name;
     OwnPtr<WebCryptoAlgorithmParams> params;
 };
 
 WebCryptoAlgorithm::WebCryptoAlgorithm(WebCryptoAlgorithmId id, const char* name, PassOwnPtr<WebCryptoAlgorithmParams> params)
     : m_private(adoptRef(new WebCryptoAlgorithmPrivate(id, name, params)))
 {
 }
 
+WebCryptoAlgorithm WebCryptoAlgorithm::adoptParamsAndCreate(WebCryptoAlgorithmId id, const char* name, WebCryptoAlgorithmParams* params)
+{
+    return WebCryptoAlgorithm(id, name, adoptPtr(params));
+}
+
 WebCryptoAlgorithmId WebCryptoAlgorithm::id() const
 {
     return m_private->id;
 }
 
 const char* WebCryptoAlgorithm::name() const
 {
     return m_private->name;
 }
 
@@ skipping 29 matching lines @@
 {
     m_private = other.m_private;
 }
 
 void WebCryptoAlgorithm::reset()
 {
     m_private.reset();
 }
 
 } // namespace WebKit