Remove docked windows entirely in M59.

ash/common/wm/panels/panel_layout_manager.h

 // Copyright (c) 2012 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_PANELS_PANEL_LAYOUT_MANAGER_H_
 #define ASH_COMMON_WM_PANELS_PANEL_LAYOUT_MANAGER_H_
 
 #include <list>
 #include <memory>
 
@@ skipping 102 matching lines @@
   // Overridden from WindowTreeHostManager::Observer
   void OnDisplayConfigurationChanged() override;
 
   // Overridden from WmShelfObserver
   void WillChangeVisibilityState(ShelfVisibilityState new_state) override;
   void OnShelfIconPositionsChanged() override;
 
  private:
   friend class PanelLayoutManagerTest;
   friend class PanelWindowResizerTest;
-  friend class DockedWindowResizerTest;
-  friend class DockedWindowLayoutManagerTest;
   friend class WorkspaceControllerTest;
   friend class AcceleratorControllerTest;
 
   views::Widget* CreateCalloutWidget();
 
   struct ASH_EXPORT PanelInfo {
     PanelInfo() : window(NULL), callout_widget(NULL), slide_in(false) {}
 
     bool operator==(const WmWindow* other_window) const {
       return window == other_window;
@@ skipping 62 matching lines @@
   // are currently focused.
   WmWindow* last_active_panel_;
   base::WeakPtrFactory<PanelLayoutManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelLayoutManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_PANELS_PANEL_LAYOUT_MANAGER_H_