[Payments] Put Web Payments feature on desktop behind flag

chrome/browser/about_flags.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 2009 matching lines @@
     {"enable-loading-ipc-optimization-for-small-resources",
      IDS_FLAGS_OPTIMIZE_LOADING_IPC_FOR_SMALL_RESOURCES_NAME,
      IDS_FLAGS_OPTIMIZE_LOADING_IPC_FOR_SMALL_RESOURCES_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(features::kOptimizeLoadingIPCForSmallResources)},
     {"enable-font-cache-scaling", IDS_FLAGS_FONT_CACHE_SCALING_NAME,
      IDS_FLAGS_FONT_CACHE_SCALING_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(features::kFontCacheScaling)},
     {"enable-framebusting-needs-sameorigin-or-usergesture",
      IDS_FLAGS_FRAMEBUSTING_NAME, IDS_FLAGS_FRAMEBUSTING_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(features::kFramebustingNeedsSameOriginOrUserGesture)},
+    {"web-payments", IDS_FLAGS_WEB_PAYMENTS_NAME,
+     IDS_FLAGS_WEB_PAYMENTS_DESCRIPTION, kOsDesktop,
+     FEATURE_VALUE_TYPE(features::kWebPayments)},
 #if defined(OS_ANDROID)
     {"enable-android-pay-integration-v1",
      IDS_FLAGS_ENABLE_ANDROID_PAY_INTEGRATION_V1_NAME,
      IDS_FLAGS_ENABLE_ANDROID_PAY_INTEGRATION_V1_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kAndroidPayIntegrationV1)},
     {"enable-android-pay-integration-v2",
      IDS_FLAGS_ENABLE_ANDROID_PAY_INTEGRATION_V2_NAME,
      IDS_FLAGS_ENABLE_ANDROID_PAY_INTEGRATION_V2_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kAndroidPayIntegrationV2)},
     {"enable-web-payments-single-app-ui-skip",
@@ skipping 451 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags