Add about:flags entry for Mac V2 sandbox.

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 1975 matching lines @@
     {"try-supported-channel-layouts",
      flag_descriptions::kTrySupportedChannelLayoutsName,
      flag_descriptions::kTrySupportedChannelLayoutsDescription, kOsWin,
      SINGLE_VALUE_TYPE(switches::kTrySupportedChannelLayouts)},
 #endif  // OS_WIN
 #if defined(OS_MACOSX)
     {"app-info-dialog", flag_descriptions::kAppInfoDialogName,
      flag_descriptions::kAppInfoDialogDescription, kOsMac,
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableAppInfoDialogMac,
                                switches::kDisableAppInfoDialogMac)},
+    {"mac-v2-sandbox", flag_descriptions::kMacV2SandboxName,
+     flag_descriptions::kMacV2SandboxDescription, kOsMac,
+     FEATURE_VALUE_TYPE(features::kMacV2Sandbox)},
     {"mac-views-native-app-windows",
      flag_descriptions::kMacViewsNativeAppWindowsName,
      flag_descriptions::kMacViewsNativeAppWindowsDescription, kOsMac,
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableMacViewsNativeAppWindows,
                                switches::kDisableMacViewsNativeAppWindows)},
     {"mac-views-task-manager", flag_descriptions::kMacViewsTaskManagerName,
      flag_descriptions::kMacViewsTaskManagerDescription, kOsMac,
      FEATURE_VALUE_TYPE(features::kViewsTaskManager)},
     {"app-window-cycling", flag_descriptions::kAppWindowCyclingName,
      flag_descriptions::kAppWindowCyclingDescription, kOsMac,
@@ skipping 1256 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags