Make X509Certificate::GetDEREncoded a static function taking an OSCertHandle

net/base/x509_certificate_win.cc

Index: net/base/x509_certificate_win.cc
diff --git a/net/base/x509_certificate_win.cc b/net/base/x509_certificate_win.cc
index 041fe4d522aa7d44ab4f43df3753c11dbbea08d9..3dda3eaa84c55a2241f07f1287211d5a26a20ede 100644
--- a/net/base/x509_certificate_win.cc
+++ b/net/base/x509_certificate_win.cc
@@ -909,12 +909,13 @@ int X509Certificate::VerifyInternal(const std::string& hostname,
   return OK;
 }
 
-bool X509Certificate::GetDEREncoded(std::string* encoded) {
-  if (!cert_handle_->pbCertEncoded || !cert_handle_->cbCertEncoded)
+// static
+bool X509Certificate::GetDEREncoded(X509Certificate::OSCertHandle cert_handle,
+                                    std::string* encoded) {
+  if (!cert_handle->pbCertEncoded || !cert_handle->cbCertEncoded)
     return false;
-  encoded->clear();
-  encoded->append(reinterpret_cast<char*>(cert_handle_->pbCertEncoded),
-                  cert_handle_->cbCertEncoded);
+  encoded->assign(reinterpret_cast<char*>(cert_handle->pbCertEncoded),
+                  cert_handle->cbCertEncoded);
   return true;
 }