Add window states docked; and docked minimized. Add wm window event to set docked and undocked.

ash/wm/maximize_mode/maximize_mode_window_state.cc

 // Copyright 2014 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/maximize_mode/maximize_mode_window_state.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 125 matching lines @@
       break;
     case wm::WM_EVENT_TOGGLE_MAXIMIZE_CAPTION:
     case wm::WM_EVENT_TOGGLE_VERTICAL_MAXIMIZE:
     case wm::WM_EVENT_TOGGLE_HORIZONTAL_MAXIMIZE:
     case wm::WM_EVENT_TOGGLE_MAXIMIZE:
     case wm::WM_EVENT_CENTER:
     case wm::WM_EVENT_SNAP_LEFT:
     case wm::WM_EVENT_SNAP_RIGHT:
     case wm::WM_EVENT_NORMAL:
     case wm::WM_EVENT_MAXIMIZE:
+    case wm::WM_EVENT_DOCK:
       UpdateWindow(window_state,
                    GetMaximizedOrCenteredWindowType(window_state),
                    true);
       return;
     case wm::WM_EVENT_MINIMIZE:
       UpdateWindow(window_state, wm::WINDOW_STATE_TYPE_MINIMIZED, true);
       return;
     case wm::WM_EVENT_SHOW_INACTIVE:
       return;
     case wm::WM_EVENT_SET_BOUNDS:
@@ skipping 151 matching lines @@
       // avoid flashing.
       if (window_state->IsMaximized())
         window_state->SetBoundsDirectCrossFade(bounds_in_parent);
       else
         window_state->SetBoundsDirectAnimated(bounds_in_parent);
     }
   }
 }
 
 }  // namespace ash