net: retain leading zero bytes in X.509 serial numbers.

net/base/x509_certificate_openssl.cc

Index: net/base/x509_certificate_openssl.cc
diff --git a/net/base/x509_certificate_openssl.cc b/net/base/x509_certificate_openssl.cc
index a0601a7f10e12fd75404eb0a1bcb09f79a48ae47..96f7df6b49d32a675535c4525d199713b16588b6 100644
--- a/net/base/x509_certificate_openssl.cc
+++ b/net/base/x509_certificate_openssl.cc
@@ -331,9 +331,6 @@ void X509Certificate::Initialize() {
     serial_number_ = std::string(
         reinterpret_cast<char*>(num->data),
         num->length);
-    // Remove leading zeros.
-    while (serial_number_.size() > 1 && serial_number_[0] == 0)
-      serial_number_ = serial_number_.substr(1, serial_number_.size() - 1);
   }
 
   ParsePrincipal(cert_handle_, X509_get_subject_name(cert_handle_), &subject_);