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

content/child/webcrypto/openssl/key_openssl.cc

Index: content/child/webcrypto/openssl/key_openssl.cc
diff --git a/content/child/webcrypto/openssl/key_openssl.cc b/content/child/webcrypto/openssl/key_openssl.cc
index ebd45e204b8a7fcce51217cfa279f6f3da76b93d..6490591aa9be7c0e33818282f87cc7f2d48ea670 100644
--- a/content/child/webcrypto/openssl/key_openssl.cc
+++ b/content/child/webcrypto/openssl/key_openssl.cc
@@ -25,6 +25,10 @@ SymKeyOpenSsl* KeyOpenSsl::AsSymKey() {
   return NULL;
 }
 
+AsymKeyOpenSsl* KeyOpenSsl::AsAsymKey() {
+  return NULL;
+}
+
 SymKeyOpenSsl::~SymKeyOpenSsl() {
 }
 
@@ -41,6 +45,22 @@ SymKeyOpenSsl::SymKeyOpenSsl(const CryptoData& raw_key_data)
     : KeyOpenSsl(raw_key_data) {
 }
 
+AsymKeyOpenSsl::~AsymKeyOpenSsl() {
+}
+
+AsymKeyOpenSsl* AsymKeyOpenSsl::Cast(const blink::WebCryptoKey& key) {
+  return reinterpret_cast<KeyOpenSsl*>(key.handle())->AsAsymKey();
+}
+
+AsymKeyOpenSsl* AsymKeyOpenSsl::AsAsymKey() {
+  return this;
+}
+
+AsymKeyOpenSsl::AsymKeyOpenSsl(crypto::ScopedEVP_PKEY key,
+                               const CryptoData& serialized_key_data)
+    : KeyOpenSsl(serialized_key_data), key_(key.Pass()) {
+}
+
 bool PlatformSerializeKeyForClone(const blink::WebCryptoKey& key,
                                   blink::WebVector<uint8>* key_data) {
   const KeyOpenSsl* openssl_key = static_cast<KeyOpenSsl*>(key.handle());