Remove docked windows entirely in M59.

ash/common/wm/lock_layout_manager.h

 // 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.
 
 #ifndef ASH_COMMON_WM_LOCK_LAYOUT_MANAGER_H_
 #define ASH_COMMON_WM_LOCK_LAYOUT_MANAGER_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/shell_observer.h"
 #include "ash/common/wm/wm_snap_to_pixel_layout_manager.h"
 #include "ash/common/wm/wm_types.h"
 #include "base/macros.h"
 #include "ui/aura/window_observer.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/keyboard/keyboard_controller.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
 
 namespace ash {
 namespace wm {
 class WindowState;
 class WMEvent;
 }
 
 // LockLayoutManager is used for the windows created in LockScreenContainer.
 // For Chrome OS this includes out-of-box/login/lock/multi-profile login use
 // cases. LockScreenContainer does not use default work area definition.
-// By default work area is defined as display area minus shelf, docked windows
-// and minus virtual keyboard bounds.
+// By default work area is defined as display area minus shelf, and minus
+// virtual keyboard bounds.
 // For windows in LockScreenContainer work area is display area minus virtual
 // keyboard bounds (only if keyboard overscroll is disabled). If keyboard
 // overscroll is enabled then work area always equals to display area size since
 // virtual keyboard changes inner workspace of each WebContents.
 // For all windows in LockScreenContainer default wm::WindowState is replaced
 // with LockWindowState.
 class ASH_EXPORT LockLayoutManager
     : public wm::WmSnapToPixelLayoutManager,
       public aura::WindowObserver,
       public ShellObserver,
@@ skipping 37 matching lines @@
 
   // The bounds of the keyboard.
   gfx::Rect keyboard_bounds_;
 
   DISALLOW_COPY_AND_ASSIGN(LockLayoutManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_LOCK_LAYOUT_MANAGER_H_