MacViews: Consolidate flags. Just use --secondary-ui-md to enable MacViews.

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 1577 matching lines @@
                                switches::kDisableAppInfoDialogMac)},
     {"mac-views-native-app-windows",
      IDS_FLAGS_MAC_VIEWS_NATIVE_APP_WINDOWS_NAME,
      IDS_FLAGS_MAC_VIEWS_NATIVE_APP_WINDOWS_DESCRIPTION, kOsMac,
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableMacViewsNativeAppWindows,
                                switches::kDisableMacViewsNativeAppWindows)},
     {"app-window-cycling", IDS_FLAGS_APP_WINDOW_CYCLING_NAME,
      IDS_FLAGS_APP_WINDOW_CYCLING_DESCRIPTION, kOsMac,
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableAppWindowCycling,
                                switches::kDisableAppWindowCycling)},
-    {"mac-views-native-dialogs", IDS_FLAGS_MAC_VIEWS_NATIVE_DIALOGS_NAME,
-     IDS_FLAGS_MAC_VIEWS_NATIVE_DIALOGS_DESCRIPTION, kOsMac,
-     FEATURE_VALUE_TYPE(chrome::kMacViewsNativeDialogs)},
-    {"mac-views-webui-dialogs", IDS_FLAGS_MAC_VIEWS_WEBUI_DIALOGS_NAME,
-     IDS_FLAGS_MAC_VIEWS_WEBUI_DIALOGS_DESCRIPTION, kOsMac,
-     FEATURE_VALUE_TYPE(chrome::kMacViewsWebUIDialogs)},
 #endif  // OS_MACOSX
 #if defined(ENABLE_WEBVR)
     {"enable-webvr", IDS_FLAGS_WEBVR_NAME, IDS_FLAGS_WEBVR_DESCRIPTION, kOsAll,
      SINGLE_VALUE_TYPE(switches::kEnableWebVR)},
 #endif  // ENABLE_WEBVR
 #if defined(ENABLE_VR_SHELL)
     {"enable-vr-shell", IDS_FLAGS_ENABLE_VR_SHELL_NAME,
      IDS_FLAGS_ENABLE_VR_SHELL_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(features::kVrShell)},
 #endif  // ENABLE_VR_SHELL
@@ skipping 704 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags