[Docking] Persists docked state on Chrome OS

ash/wm/window_state.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/wm/window_state.h"
 
 #include "ash/ash_switches.h"
 #include "ash/root_window_controller.h"
 #include "ash/screen_util.h"
 #include "ash/shell_window_ids.h"
@@ skipping 53 matching lines @@
     case ui::SHOW_STATE_NORMAL:
       return WM_EVENT_NORMAL;
     case ui::SHOW_STATE_MINIMIZED:
       return WM_EVENT_MINIMIZE;
     case ui::SHOW_STATE_MAXIMIZED:
       return WM_EVENT_MAXIMIZE;
     case ui::SHOW_STATE_FULLSCREEN:
       return WM_EVENT_FULLSCREEN;
     case ui::SHOW_STATE_INACTIVE:
       return WM_EVENT_SHOW_INACTIVE;
+    case ui::SHOW_STATE_DOCKED:
+      return WM_EVENT_DOCK;
     case ui::SHOW_STATE_END:
       NOTREACHED() << "No WMEvent defined for the show state:"
                    << requested_show_state;
   }
   return WM_EVENT_NORMAL;
 }
 
 }  // namespace
 
 WindowState::~WindowState() {
@@ skipping 367 matching lines @@
   }
   return settings;
 }
 
 const WindowState* GetWindowState(const aura::Window* window) {
   return GetWindowState(const_cast<aura::Window*>(window));
 }
 
 }  // namespace wm
 }  // namespace ash