Move printing defines to buildflag system.

content/browser/renderer_host/pepper/pepper_print_settings_manager.cc

Index: content/browser/renderer_host/pepper/pepper_print_settings_manager.cc
diff --git a/content/browser/renderer_host/pepper/pepper_print_settings_manager.cc b/content/browser/renderer_host/pepper/pepper_print_settings_manager.cc
index 8e2d7fa4832206c76eef6b9fa1f975f5958370d4..f18aa82ececa47aa2982991aa202ccd8333c7fcb 100644
--- a/content/browser/renderer_host/pepper/pepper_print_settings_manager.cc
+++ b/content/browser/renderer_host/pepper/pepper_print_settings_manager.cc
@@ -8,8 +8,9 @@
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/common/content_client.h"
 #include "ppapi/c/pp_errors.h"
+#include "printing/features/features.h"
 
-#if defined(ENABLE_PRINT_PREVIEW)
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 #include "printing/printing_context.h"  // nogncheck
 #include "printing/units.h"  // nogncheck
 #endif
@@ -18,7 +19,7 @@ namespace content {
 
 namespace {
 
-#if defined(ENABLE_PRINT_PREVIEW)
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 // Print units conversion functions.
 int32_t DeviceUnitsInPoints(int32_t device_units,
                             int32_t device_units_per_inch) {