Remove docked windows entirely in M59.

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 1092 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-mirrored-screen", IDS_FLAGS_ASH_ENABLE_MIRRORED_SCREEN_NAME,
         IDS_FLAGS_ASH_ENABLE_MIRRORED_SCREEN_DESCRIPTION, kOsCrOS,
         SINGLE_VALUE_TYPE(ash::switches::kAshEnableMirroredScreen),
     },
     {"ash-shelf-color", IDS_FLAGS_ASH_SHELF_COLOR,
      IDS_FLAGS_ASH_SHELF_COLOR_DESCRIPTION, kOsCrOS,
      MULTI_VALUE_TYPE(kAshShelfColorChoices)},
 #endif  // USE_ASH
 #if defined(OS_CHROMEOS)
     {"material-design-ink-drop-animation-speed",
@@ skipping 1490 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags