Make X509Certificate::GetDEREncoded a static function taking an OSCertHandle

net/base/x509_certificate_mac.cc

Index: net/base/x509_certificate_mac.cc
diff --git a/net/base/x509_certificate_mac.cc b/net/base/x509_certificate_mac.cc
index 61dbbe206f3d7073d22435a2837604b49be8eb1e..44acddf78167f84f1a5b912954ccd172c5bf6d0f 100644
--- a/net/base/x509_certificate_mac.cc
+++ b/net/base/x509_certificate_mac.cc
@@ -957,15 +957,15 @@ int X509Certificate::VerifyInternal(const std::string& hostname,
   return OK;
 }
 
-bool X509Certificate::GetDEREncoded(std::string* encoded) {
-  encoded->clear();
+// static
+bool X509Certificate::GetDEREncoded(X509Certificate::OSCertHandle cert_handle,
+                                    std::string* encoded) {
   CSSM_DATA der_data;
-  if (SecCertificateGetData(cert_handle_, &der_data) == noErr) {
-    encoded->append(reinterpret_cast<char*>(der_data.Data),
-                    der_data.Length);
-    return true;
-  }
-  return false;
+  if (SecCertificateGetData(cert_handle, &der_data) != noErr)
+    return false;
+  encoded->assign(reinterpret_cast<char*>(der_data.Data),
+                  der_data.Length);
+  return true;
 }
 
 // static