Remove the simplified-fullscreen-ui flag 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 1573 matching lines @@
      IDS_FLAGS_V8_CACHE_STRATEGIES_FOR_CACHE_STORAGE_NAME,
      IDS_FLAGS_V8_CACHE_STRATEGIES_FOR_CACHE_STORAGE_DESCRIPTION, kOsAll,
      MULTI_VALUE_TYPE(kV8CacheStrategiesForCacheStorageChoices)},
     {"enable-clear-browsing-data-counters",
      IDS_FLAGS_ENABLE_CLEAR_BROWSING_DATA_COUNTERS_NAME,
      IDS_FLAGS_ENABLE_CLEAR_BROWSING_DATA_COUNTERS_DESCRIPTION, kOsAll,
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableClearBrowsingDataCounters,
                                switches::kDisableClearBrowsingDataCounters)},
 #if defined(ENABLE_TASK_MANAGER)
     {"disable-new-task-manager", IDS_FLAGS_NEW_TASK_MANAGER_NAME,
-     IDS_FLAGS_NEW_TASK_MANAGER_DESCRIPTION, kOsDesktop,
+     IDS_FLAGS_NEW_TASK_MANAGER_DESCRIPTION,
+     kOsWin | kOsLinux | kOsCrOS | kOsAndroid,

[Matt Giuca, 2016/05/26 05:42:05]

Um wait don't look at this lol.

[Matt Giuca, 2016/05/26 05:46:32]

OK fixed.

      SINGLE_DISABLE_VALUE_TYPE(switches::kDisableNewTaskManager)},
 #endif  // defined(ENABLE_TASK_MANAGER)
     {"simplified-fullscreen-ui", IDS_FLAGS_SIMPLIFIED_FULLSCREEN_UI_NAME,
      IDS_FLAGS_SIMPLIFIED_FULLSCREEN_UI_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(features::kSimplifiedFullscreenUI)},
     {"experimental-keyboard-lock-ui",
      IDS_FLAGS_EXPERIMENTAL_KEYBOARD_LOCK_UI_NAME,
      IDS_FLAGS_EXPERIMENTAL_KEYBOARD_LOCK_UI_DESCRIPTION, kOsDesktop,
      FEATURE_VALUE_TYPE(features::kExperimentalKeyboardLockUI)},
 #if defined(OS_ANDROID)
@@ skipping 481 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags