Unify window fullscreen and minimizing implementation

ash/common/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/common/wm/window_state.h"
 
 #include <utility>
 
 #include "ash/common/wm/default_state.h"
 #include "ash/common/wm/window_positioning_utils.h"
@@ skipping 17 matching lines @@
     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_PREVIOUS:
     case ui::SHOW_STATE_END:
       NOTREACHED() << "No WMEvent defined for the show state:"
                    << requested_show_state;
   }
   return WM_EVENT_NORMAL;
 }
 
 }  // namespace
 
 WindowState::~WindowState() {}
@@ skipping 342 matching lines @@
   if (!window_->GetTargetVisibility()) {
     SetBoundsConstrained(new_bounds);
     return;
   }
 
   window_->SetBoundsDirectCrossFade(new_bounds);
 }
 
 }  // namespace wm
 }  // namespace ash