Hide docked windows behind a 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 1005 matching lines @@
         SINGLE_VALUE_TYPE(ash::switches::kAshDebugShortcuts),
     },
     {
         "ash-disable-maximize-mode-window-backdrop",
         IDS_FLAGS_ASH_MAXIMIZE_MODE_WINDOW_BACKDROP_NAME,
         IDS_FLAGS_ASH_MAXIMIZE_MODE_WINDOW_BACKDROP_DESCRIPTION, kOsCrOS,
         SINGLE_DISABLE_VALUE_TYPE(
             ash::switches::kAshDisableMaximizeModeWindowBackdrop),
     },
     {
+        "ash-enable-docked-windows",
+        IDS_FLAGS_ASH_ENABLE_DOCKED_WINDOWS_NAME,
+        IDS_FLAGS_ASH_ENABLE_DOCKED_WINDOWS_DESCRIPTION, kOsAll,
+        SINGLE_VALUE_TYPE(ash::switches::kAshEnableDockedWindows),
+    },
+    {
         "ash-enable-touch-view-testing",
         IDS_FLAGS_ASH_ENABLE_TOUCH_VIEW_TESTING_NAME,
         IDS_FLAGS_ASH_ENABLE_TOUCH_VIEW_TESTING_DESCRIPTION, kOsCrOS,
         SINGLE_VALUE_TYPE(ash::switches::kAshEnableTouchViewTesting),
     },
     {
         "ash-enable-mirrored-screen", IDS_FLAGS_ASH_ENABLE_MIRRORED_SCREEN_NAME,
         IDS_FLAGS_ASH_ENABLE_MIRRORED_SCREEN_DESCRIPTION, kOsCrOS,
         SINGLE_VALUE_TYPE(ash::switches::kAshEnableMirroredScreen),
     },
@@ skipping 1347 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags