Hardcode extensions::util::IsNewBookmarkAppsEnabled() to true, except on Mac.

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 1323 matching lines @@
 #endif  // OS_ANDROID
     {"enable-zero-copy", IDS_FLAGS_ZERO_COPY_NAME,
      IDS_FLAGS_ZERO_COPY_DESCRIPTION, kOsAll,
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableZeroCopy,
                                switches::kDisableZeroCopy)},
 #if defined(OS_CHROMEOS)
     {"enable-first-run-ui-transitions", IDS_FLAGS_FIRST_RUN_UI_TRANSITIONS_NAME,
      IDS_FLAGS_FIRST_RUN_UI_TRANSITIONS_DESCRIPTION, kOsCrOS,
      SINGLE_VALUE_TYPE(chromeos::switches::kEnableFirstRunUITransitions)},
 #endif  // OS_CHROMEOS
-    {"disable-new-bookmark-apps", IDS_FLAGS_NEW_BOOKMARK_APPS_NAME,
-     IDS_FLAGS_NEW_BOOKMARK_APPS_DESCRIPTION,
-     kOsWin | kOsCrOS | kOsLinux | kOsMac,
-     ENABLE_DISABLE_VALUE_TYPE(switches::kEnableNewBookmarkApps,
-                               switches::kDisableNewBookmarkApps)},
 #if defined(OS_MACOSX)
+    {"bookmark-apps", IDS_FLAGS_NEW_BOOKMARK_APPS_NAME,
+     IDS_FLAGS_NEW_BOOKMARK_APPS_DESCRIPTION, kOsMac,
+     FEATURE_VALUE_TYPE(features::kBookmarkApps)},
     {"disable-hosted-apps-in-windows", IDS_FLAGS_HOSTED_APPS_IN_WINDOWS_NAME,
      IDS_FLAGS_HOSTED_APPS_IN_WINDOWS_DESCRIPTION, kOsMac,
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableHostedAppsInWindows,
                                switches::kDisableHostedAppsInWindows)},
     {"disable-hosted-app-shim-creation",
      IDS_FLAGS_HOSTED_APP_SHIM_CREATION_NAME,
      IDS_FLAGS_HOSTED_APP_SHIM_CREATION_DESCRIPTION, kOsMac,
      SINGLE_DISABLE_VALUE_TYPE(switches::kDisableHostedAppShimCreation)},
     {"enable-hosted-app-quit-notification",
      IDS_FLAGS_HOSTED_APP_QUIT_NOTIFICATION_NAME,
@@ skipping 1166 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags