Fix the condition when disabling CertLoaderTest and NetworkCertMigratorTest.

BUG=418369
TBR=zelidrag@chromium.org

Review URL: https://codereview.chromium.org/607313002

Cr-Commit-Position: refs/heads/master@{#297124}

chromeos/cert_loader_unittest.cc

@@ -20,7 +20,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 
 // http://crbug.com/418369
-#ifndef NDEBUG
+#ifdef NDEBUG
 
 namespace chromeos {
 namespace {

chromeos/network/network_cert_migrator_unittest.cc

@@ -28,7 +28,7 @@
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
 // http://crbug.com/418369
-#ifndef NDEBUG
+#ifdef NDEBUG
 
 namespace chromeos {