Update Chrome Upstream flow to reflect new UI mocks

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index fca463043d51bcca0062a43fefb507803ef49253..3504f975a43adcc1497c74c8dccedf1f0ad16f2c 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2876,6 +2876,10 @@ const FeatureEntry kFeatureEntries[] = {
      flag_descriptions::kEnableAutofillCreditCardUploadCvcPromptDescription,
      kOsDesktop,
      FEATURE_VALUE_TYPE(autofill::kAutofillUpstreamRequestCvcIfMissing)},
+    {"enable-autofill-credit-card-upload-new-ui",
+     flag_descriptions::kEnableAutofillCreditCardUploadNewUiName,
+     flag_descriptions::kEnableAutofillCreditCardUploadNewUiDescription,
+     kOsDesktop, FEATURE_VALUE_TYPE(autofill::kAutofillUpstreamShowNewUi)},
     {"enable-autofill-credit-card-bank-name-display",
      flag_descriptions::kEnableAutofillCreditCardBankNameDisplayName,
      flag_descriptions::kEnableAutofillCreditCardBankNameDisplayDescription,