Use the exact-width integer types defined in <stdint.h> rather than

net/cert/x509_util.h

Index: net/cert/x509_util.h
diff --git a/net/cert/x509_util.h b/net/cert/x509_util.h
index a996f85e6a294b1518969649d6c32d76ea9e396f..a1c296894681ccfd61e6ca5e4c412ebb6a2d697e 100644
--- a/net/cert/x509_util.h
+++ b/net/cert/x509_util.h
@@ -5,6 +5,7 @@
 #ifndef NET_CERT_X509_UTIL_H_
 #define NET_CERT_X509_UTIL_H_
 
+#include <stdint.h>
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ -56,7 +57,7 @@ NET_EXPORT_PRIVATE bool IsSupportedValidityRange(base::Time not_valid_before,
 // Use this certificate only after the above risks are acknowledged.
 NET_EXPORT bool CreateKeyAndSelfSignedCert(
     const std::string& subject,
-    uint32 serial_number,
+    uint32_t serial_number,
     base::Time not_valid_before,
     base::Time not_valid_after,
     scoped_ptr<crypto::RSAPrivateKey>* key,
@@ -68,7 +69,7 @@ NET_EXPORT bool CreateKeyAndSelfSignedCert(
 NET_EXPORT bool CreateSelfSignedCert(crypto::RSAPrivateKey* key,
                                      DigestAlgorithm alg,
                                      const std::string& subject,
-                                     uint32 serial_number,
+                                     uint32_t serial_number,
                                      base::Time not_valid_before,
                                      base::Time not_valid_after,
                                      std::string* der_cert);