Move printing defines to buildflag system.

printing/print_job_constants.cc

Index: printing/print_job_constants.cc
diff --git a/printing/print_job_constants.cc b/printing/print_job_constants.cc
index cae9c91a0c659185721ba7c20af0b78cce3feed5..6dad017ceeb390c7f9aafb8568fc1b6946e37040 100644
--- a/printing/print_job_constants.cc
+++ b/printing/print_job_constants.cc
@@ -4,6 +4,8 @@
 
 #include "printing/print_job_constants.h"
 
+#include "printing/features/features.h"
+
 namespace printing {
 
 // True if this is the first preview request.
@@ -179,7 +181,7 @@ const char kSettingShouldPrintBackgrounds[] = "shouldPrintBackgrounds";
 // Whether to print selection only.
 const char kSettingShouldPrintSelectionOnly[] = "shouldPrintSelectionOnly";
 
-#if defined(ENABLE_BASIC_PRINTING)
+#if BUILDFLAG(ENABLE_BASIC_PRINTING)
 // Whether to print using the system dialog.
 const char kSettingShowSystemDialog[] = "showSystemDialog";
 #endif