Switch to standard integer types in components/, part 3 of 4.

components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h

Index: components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h
diff --git a/components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h b/components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h
index 82730a39cde3141b2dda0594c6dada9d94577bc9..0ca737ce6f6c4ba26a218314c46a249bfd7eb174 100644
--- a/components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h
+++ b/components/proximity_auth/cryptauth/cryptauth_enrollment_utils.h
@@ -14,8 +14,8 @@ namespace proximity_auth {
 std::string CalculateDeviceUserId(const std::string& device_id,
                                   const std::string& user_id);
 
-// Hashes |string| to an int64 value. These int64 hashes are used to fill the
-// GcmDeviceInfo proto to upload to CryptAuth.
+// Hashes |string| to an int64_t value. These int64_t hashes are used to fill
+// the GcmDeviceInfo proto to upload to CryptAuth.
 int64_t HashStringToInt64(const std::string& string);
 
 }  // namespace proximity_auth