Remove persisted docked windows

ash/common/wm/wm_types.cc

 // Copyright 2013 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 "ash/common/wm/wm_types.h"
 
 #include "base/logging.h"
 
 namespace ash {
 namespace wm {
 
 // This is to catch the change to WindowShowState.
 static_assert(ui::SHOW_STATE_END ==
                   static_cast<ui::WindowShowState>(WINDOW_STATE_TYPE_END),
               "show enum mismatch");
 
 WindowStateType ToWindowStateType(ui::WindowShowState state) {
   return static_cast<WindowStateType>(state);
 }
 
 ui::WindowShowState ToWindowShowState(WindowStateType type) {
   switch (type) {
     case WINDOW_STATE_TYPE_DEFAULT:
       return ui::SHOW_STATE_DEFAULT;
     case WINDOW_STATE_TYPE_NORMAL:
     case WINDOW_STATE_TYPE_RIGHT_SNAPPED:
     case WINDOW_STATE_TYPE_LEFT_SNAPPED:
     case WINDOW_STATE_TYPE_AUTO_POSITIONED:
       return ui::SHOW_STATE_NORMAL;
+
+    // TODO(afakhry): Remove Docked Windows in M58.
     case WINDOW_STATE_TYPE_DOCKED:
       return ui::SHOW_STATE_DOCKED;
     case WINDOW_STATE_TYPE_MINIMIZED:
     case WINDOW_STATE_TYPE_DOCKED_MINIMIZED:
       return ui::SHOW_STATE_MINIMIZED;
     case WINDOW_STATE_TYPE_MAXIMIZED:
       return ui::SHOW_STATE_MAXIMIZED;
     case WINDOW_STATE_TYPE_INACTIVE:
       return ui::SHOW_STATE_INACTIVE;
     case WINDOW_STATE_TYPE_FULLSCREEN:
     case WINDOW_STATE_TYPE_PINNED:
     case WINDOW_STATE_TYPE_TRUSTED_PINNED:
       return ui::SHOW_STATE_FULLSCREEN;
     case WINDOW_STATE_TYPE_END:
       NOTREACHED();
   }
   NOTREACHED();
   return ui::SHOW_STATE_DEFAULT;
 }
 
 bool IsMaximizedOrFullscreenOrPinnedWindowStateType(WindowStateType type) {
   return type == WINDOW_STATE_TYPE_MAXIMIZED ||
          type == WINDOW_STATE_TYPE_FULLSCREEN ||
          type == WINDOW_STATE_TYPE_PINNED ||
          type == WINDOW_STATE_TYPE_TRUSTED_PINNED;
 }
 
 }  // namespace wm
 }  // namespace ash