[webcrypto] Wire up {spki, pkcs8} import/export for OpenSSL.

content/child/webcrypto/openssl/rsa_ssa_openssl.cc

+// 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.
+
+#include "content/child/webcrypto/crypto_data.h"
+#include "content/child/webcrypto/openssl/key_openssl.h"
+#include "content/child/webcrypto/openssl/rsa_key_openssl.h"
+#include "content/child/webcrypto/status.h"
+#include "third_party/WebKit/public/platform/WebCryptoKeyAlgorithm.h"
+
+namespace content {
+
+namespace webcrypto {
+
+namespace {
+
+class RsaSsaImplementation : public RsaHashedAlgorithm {
+ public:
+  RsaSsaImplementation()
+      : RsaHashedAlgorithm(blink::WebCryptoKeyUsageVerify,
+                           blink::WebCryptoKeyUsageSign) {}
+
+  // TODO(eroman): Implement Sign() and Verify().
+};
+
+}  // namespace
+
+AlgorithmImplementation* CreatePlatformRsaSsaImplementation() {
+  return new RsaSsaImplementation;
+}
+
+}  // namespace webcrypto
+
+}  // namespace content