Move printing defines to buildflag system.

chrome/test/base/web_ui_browser_test.cc

Index: chrome/test/base/web_ui_browser_test.cc
diff --git a/chrome/test/base/web_ui_browser_test.cc b/chrome/test/base/web_ui_browser_test.cc
index afb17ec60b16c6cd0b485a96c1a073fee6105ee2..c50a43458e417ea7807b06f0105ac1e20acec35d 100644
--- a/chrome/test/base/web_ui_browser_test.cc
+++ b/chrome/test/base/web_ui_browser_test.cc
@@ -36,9 +36,10 @@
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/test_navigation_observer.h"
 #include "net/base/filename_util.h"
+#include "printing/features/features.h"
 #include "ui/base/resource/resource_handle.h"
 
-#if defined(ENABLE_PRINT_PREVIEW)
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 #include "chrome/browser/printing/print_preview_dialog_controller.h"
 #endif
 
@@ -237,7 +238,7 @@ void WebUIBrowserTest::BrowsePreload(const GURL& browse_to) {
   navigation_observer.Wait();
 }
 
-#if defined(ENABLE_PRINT_PREVIEW)
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 // This custom ContentBrowserClient is used to get notified when a WebContents
 // for the print preview dialog gets created.
@@ -280,7 +281,7 @@ class PrintContentBrowserClient : public ChromeContentBrowserClient {
 #endif
 
 void WebUIBrowserTest::BrowsePrintPreload(const GURL& browse_to) {
-#if defined(ENABLE_PRINT_PREVIEW)
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   ui_test_utils::NavigateToURL(browser(), browse_to);
 
   PrintContentBrowserClient new_client(