Convert RLZ to a buildflag header

chrome/browser/ui/browser_commands.cc

Index: chrome/browser/ui/browser_commands.cc
diff --git a/chrome/browser/ui/browser_commands.cc b/chrome/browser/ui/browser_commands.cc
index 077e4833d47dbe10482e23e6eef62e83dd803b3a..285a38281ab495484b0677550b8f9e27b9dc3df7 100644
--- a/chrome/browser/ui/browser_commands.cc
+++ b/chrome/browser/ui/browser_commands.cc
@@ -87,6 +87,7 @@
 #include "extensions/features/features.h"
 #include "net/base/escape.h"
 #include "printing/features/features.h"
+#include "rlz/features/features.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 
 #if BUILDFLAG(ENABLE_EXTENSIONS)
@@ -110,7 +111,7 @@
 #endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 #endif  // BUILDFLAG(ENABLE_PRINTING)
 
-#if defined(ENABLE_RLZ)
+#if BUILDFLAG(ENABLE_RLZ)
 #include "components/rlz/rlz_tracker.h"  // nogncheck
 #endif
 
@@ -473,7 +474,7 @@ void Home(Browser* browser, WindowOpenDisposition disposition) {
   content::RecordAction(UserMetricsAction("Home"));
 
   std::string extra_headers;
-#if defined(ENABLE_RLZ)
+#if BUILDFLAG(ENABLE_RLZ)
   // If the home page is a Google home page, add the RLZ header to the request.
   PrefService* pref_service = browser->profile()->GetPrefs();
   if (pref_service) {
@@ -483,7 +484,7 @@ void Home(Browser* browser, WindowOpenDisposition disposition) {
           rlz::RLZTracker::ChromeHomePage());
     }
   }
-#endif  // defined(ENABLE_RLZ)
+#endif  // BUILDFLAG(ENABLE_RLZ)
 
   GURL url = browser->profile()->GetHomePage();