[ash-md] Erases the pre-MD code path for Overview Mode

ash/common/wm/overview/window_selector_item.h

 // 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.
 
 #ifndef ASH_COMMON_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
 #define ASH_COMMON_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
@@ skipping 109 matching lines @@
   // by |animation_type|.
   void SetBounds(const gfx::Rect& target_bounds,
                  OverviewAnimationType animation_type);
 
   // Activates or deactivates selection depending on |selected|.
   // Currently does nothing unless Material Design is enabled. With Material
   // Design the item's caption is shown transparent in selected state and blends
   // with the selection widget.
   void SetSelected(bool selected);
 
-  // Recomputes the positions for the windows in this selection item. This is
-  // dispatched when the bounds of a window change.
-  void RecomputeWindowTransforms();
-
   // Sends an accessibility event indicating that this window became selected
   // so that it's highlighted and announced if accessibility features are
   // enabled.
   void SendAccessibleSelectionEvent();
 
   // Closes |transform_window_|.
   void CloseWindow();
 
   // Hides the original window header and sets shape or mask on a window.
   // When masks are used, rounded corner |radius| can be specified.
   // TODO(varkha): remove |radius|.
   void HideHeaderAndSetShape(int radius);
 
   // Sets if the item is dimmed in the overview. Changing the value will also
   // change the visibility of the transform windows.
   void SetDimmed(bool dimmed);
   bool dimmed() const { return dimmed_; }
 
   const gfx::Rect& target_bounds() const { return target_bounds_; }
-  static void set_use_mask(bool use_mask) { use_mask_ = use_mask; }
-  static void set_use_shape(bool use_shape) { use_shape_ = use_shape; }
 
   // views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // WmWindowObserver:
   void OnWindowDestroying(WmWindow* window) override;
   void OnWindowTitleChanged(WmWindow* window) override;
 
  private:
   class CaptionContainerView;
@@ skipping 36 matching lines @@
 
   // Updates the close buttons accessibility name.
   void UpdateCloseButtonAccessibilityName();
 
   // Fades out a window caption when exiting overview mode.
   void FadeOut(std::unique_ptr<views::Widget> widget);
 
   // Allows a test to directly set animation state.
   gfx::SlideAnimation* GetBackgroundViewAnimation();
 
-  static bool hide_header() { return use_mask_ || use_shape_; }
-
   // True if the item is being shown in the overview, false if it's being
   // filtered.
   bool dimmed_;
 
   // The root window this item is being displayed on.
   WmWindow* root_window_;
 
   // The contained Window's wrapper.
   ScopedTransformOverviewWindow transform_window_;
 
@@ skipping 18 matching lines @@
   // Shadow around the item in overview.
   std::unique_ptr<::wm::Shadow> shadow_;
 
   // Container view that owns |window_label_button_view_| and |close_button_|.
   // Only used with Material Design.
   CaptionContainerView* caption_container_view_;
 
   // View for the label below the window or (with material design) above it.
   OverviewLabelButton* window_label_button_view_;
 
-  // The close buttons widget container. Not used with Material Design.
-  std::unique_ptr<views::Widget> close_button_widget_;
-
   // A close button for the window in this item. Owned by the
   // |caption_container_view_| with Material Design or by |close_button_widget_|
   // otherwise.
   OverviewCloseButton* close_button_;
 
   // Pointer to the WindowSelector that owns the WindowGrid containing |this|.
   // Guaranteed to be non-null for the lifetime of |this|.
   WindowSelector* window_selector_;
 
   // Pointer to a view that covers the original header and has rounded top
   // corners. This view can have its color and opacity animated.
   RoundedContainerView* background_view_;
 
-  // If true, mask the original window header while in overview and make corners
-  // rounded using a mask layer. This has performance implications so it can be
-  // disabled when there are many windows.
-  static bool use_mask_;
-
-  // If true, hide the original window header while in overview using alpha
-  // shape. This has performance implications so it can be disabled when there
-  // are many windows.
-  static bool use_shape_;
-
   DISALLOW_COPY_AND_ASSIGN(WindowSelectorItem);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_