Convert crypto::ScopedOpenSSL to type aliases.

extensions/common/cast/cast_cert_validator_openssl.cc

Index: extensions/common/cast/cast_cert_validator_openssl.cc
diff --git a/extensions/common/cast/cast_cert_validator_openssl.cc b/extensions/common/cast/cast_cert_validator_openssl.cc
index 8c2e4c0721ed7019e8b07651538d16ab624490a3..326aa498db4167cc83b5f0e964d9ca79ca0117cf 100644
--- a/extensions/common/cast/cast_cert_validator_openssl.cc
+++ b/extensions/common/cast/cast_cert_validator_openssl.cc
@@ -18,14 +18,13 @@
 #include "extensions/browser/api/cast_channel/cast_auth_ica.h"
 #include "net/cert/x509_certificate.h"
 #include "net/cert/x509_util_openssl.h"
+#include "net/ssl/scoped_openssl_types.h"
 
 namespace extensions {
 namespace core_api {
 namespace cast_crypto {
 namespace {
 
-typedef crypto::ScopedOpenSSL<X509, X509_free>::Type ScopedX509;
-
 class CertVerificationContextOpenSSL : public CertVerificationContext {
  public:
   // Takes ownership of the passed-in x509 object
@@ -80,7 +79,7 @@ class CertVerificationContextOpenSSL : public CertVerificationContext {
   }
 
  private:
-  ScopedX509 x509_;
+  net::ScopedX509 x509_;
 };
 
 }  // namespace
@@ -127,7 +126,7 @@ VerificationResult VerifyDeviceCert(
   const uint8_t* device_cert_der_ptr =
       reinterpret_cast<const uint8_t*>(device_cert.data());
   const uint8_t* device_cert_der_end = device_cert_der_ptr + device_cert.size();
-  ScopedX509 device_cert_x509(
+  net::ScopedX509 device_cert_x509(
       d2i_X509(NULL, &device_cert_der_ptr, device_cert.size()));
   if (!device_cert_x509 || device_cert_der_ptr != device_cert_der_end) {
     return VerificationResult("Failed to parse device certificate.",