Remove persisted docked windows

chrome/browser/extensions/api/sessions/sessions_api.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 "chrome/browser/extensions/api/sessions/sessions_api.h"
 
 #include <stddef.h>
 
 #include <utility>
 #include <vector>
@@ skipping 257 matching lines @@
       type = windows::WINDOW_TYPE_NORMAL;
       break;
     case sessions::SessionWindow::TYPE_POPUP:
       type = windows::WINDOW_TYPE_POPUP;
       break;
   }
 
   windows::WindowState state = windows::WINDOW_STATE_NONE;
   switch (window.show_state) {
     case ui::SHOW_STATE_NORMAL:
+
+    // TODO(afakhry): Remove Docked Windows in M58.
     case ui::SHOW_STATE_DOCKED:
       state = windows::WINDOW_STATE_NORMAL;
       break;
     case ui::SHOW_STATE_MINIMIZED:
       state = windows::WINDOW_STATE_MINIMIZED;
       break;
     case ui::SHOW_STATE_MAXIMIZED:
       state = windows::WINDOW_STATE_MAXIMIZED;
       break;
     case ui::SHOW_STATE_FULLSCREEN:
@@ skipping 314 matching lines @@
   return g_factory.Pointer();
 }
 
 void SessionsAPI::OnListenerAdded(const EventListenerInfo& details) {
   sessions_event_router_.reset(
       new SessionsEventRouter(Profile::FromBrowserContext(browser_context_)));
   EventRouter::Get(browser_context_)->UnregisterObserver(this);
 }
 
 }  // namespace extensions