Optimize CT & OCSP handling code

net/cert/ct_signed_certificate_timestamp_log_param.h

Index: net/cert/ct_signed_certificate_timestamp_log_param.h
diff --git a/net/cert/ct_signed_certificate_timestamp_log_param.h b/net/cert/ct_signed_certificate_timestamp_log_param.h
index 373a75253372d1c2f365dac32b85d6d82f1c37a5..c2149cdb5782dbf496063eaf3f0029f4050a675d 100644
--- a/net/cert/ct_signed_certificate_timestamp_log_param.h
+++ b/net/cert/ct_signed_certificate_timestamp_log_param.h
@@ -6,8 +6,8 @@
 #define NET_CERT_CT_SIGNED_CERTIFICATE_TIMESTAMP_LOG_PARAM_H_
 
 #include <memory>
-#include <string>
 
+#include "base/strings/string_piece.h"
 #include "net/cert/signed_certificate_timestamp_and_status.h"
 
 namespace base {
@@ -31,9 +31,9 @@ std::unique_ptr<base::Value> NetLogSignedCertificateTimestampCallback(
 // See the documentation for SIGNED_CERTIFICATE_TIMESTAMPS_RECEIVED
 // in net/log/net_log_event_type_list.h
 std::unique_ptr<base::Value> NetLogRawSignedCertificateTimestampCallback(
-    const std::string* embedded_scts,
-    const std::string* sct_list_from_ocsp,
-    const std::string* sct_list_from_tls_extension,
+    base::StringPiece embedded_scts,
+    base::StringPiece sct_list_from_ocsp,
+    base::StringPiece sct_list_from_tls_extension,
     NetLogCaptureMode capture_mode);
 
 }  // namespace net