[Payments] Desktop: enable the Payment Request integration by default

chrome/browser/payments/site_per_process_payments_browsertest.cc

Index: chrome/browser/payments/site_per_process_payments_browsertest.cc
diff --git a/chrome/browser/payments/site_per_process_payments_browsertest.cc b/chrome/browser/payments/site_per_process_payments_browsertest.cc
index cc1448e5c77bb41c8b9b5ee55a96b8648cff27f9..7090e552377279e39312f368a7b2905200d40637 100644
--- a/chrome/browser/payments/site_per_process_payments_browsertest.cc
+++ b/chrome/browser/payments/site_per_process_payments_browsertest.cc
@@ -12,7 +12,6 @@
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
-#include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/test_utils.h"
@@ -33,10 +32,7 @@ class SitePerProcessPaymentsBrowserTest : public InProcessBrowserTest {
     // HTTPS server only serves a valid cert for localhost, so this is needed
     // to load pages from other hosts without an error.
     command_line->AppendSwitch(switches::kIgnoreCertificateErrors);
-    command_line->AppendSwitch(
-        switches::kEnableExperimentalWebPlatformFeatures);
-    command_line->AppendSwitchASCII(switches::kEnableFeatures,
-                                    features::kWebPayments.name);
+
     // Append --site-per-process flag.
     content::IsolateAllSitesForTesting(command_line);
   }