Remove docked windows entirely in M59.

ash/common/wm/overview/window_grid.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/common/wm/overview/window_grid.h"
 
 #include <algorithm>
 #include <functional>
 #include <set>
 #include <utility>
@@ skipping 249 matching lines @@
         background_color, border_color, border_thickness, border_radius));
     widget->SetContentsView(content_view);
   }
   widget_window->GetParent()->StackChildAtTop(widget_window);
   widget->Show();
   widget_window->SetOpacity(initial_opacity);
   return widget;
 }
 
 bool IsMinimizedStateType(wm::WindowStateType type) {
-  return type == wm::WINDOW_STATE_TYPE_DOCKED_MINIMIZED ||
-         type == wm::WINDOW_STATE_TYPE_MINIMIZED;
+  return type == wm::WINDOW_STATE_TYPE_MINIMIZED;
 }
 
 }  // namespace
 
 WindowGrid::WindowGrid(WmWindow* root_window,
                        const std::vector<WmWindow*>& windows,
                        WindowSelector* window_selector)
     : root_window_(root_window),
       window_selector_(window_selector),
       window_observer_(this),
@@ skipping 553 matching lines @@
         *min_right = left;
       if (*max_right < left)
         *max_right = left;
     }
     *max_bottom = top + height;
   }
   return windows_fit;
 }
 
 }  // namespace ash