Move printing defines to buildflag system.

chrome/browser/browser_shutdown.cc

Index: chrome/browser/browser_shutdown.cc
diff --git a/chrome/browser/browser_shutdown.cc b/chrome/browser/browser_shutdown.cc
index bade7e3c5fd6e6fb49caa8ac49f42f08560cdba2..7228be2d60d80e2cedfa30bf908ed2e35f8260fb 100644
--- a/chrome/browser/browser_shutdown.cc
+++ b/chrome/browser/browser_shutdown.cc
@@ -38,6 +38,7 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/tracing_controller.h"
+#include "printing/features/features.h"
 
 #if defined(OS_WIN)
 #include "chrome/browser/first_run/upgrade_util_win.h"
@@ -60,7 +61,7 @@
 #include "chrome/browser/chromeos/boot_times_recorder.h"
 #endif
 
-#if defined(ENABLE_PRINT_PREVIEW)
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 #include "chrome/browser/service_process/service_process_control.h"
 #endif
 
@@ -154,7 +155,7 @@ bool ShutdownPreThreadsStop() {
   chromeos::BootTimesRecorder::Get()->AddLogoutTimeMarker(
       "BrowserShutdownStarted", false);
 #endif
-#if defined(ENABLE_PRINT_PREVIEW)
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   // Shutdown the IPC channel to the service processes.
   ServiceProcessControl::GetInstance()->Disconnect();
 #endif  // ENABLE_PRINT_PREVIEW