Revert of 'Signin screen and locked screen status area focus advancing'

ash/common/system/status_area_widget_delegate.h

Index: ash/common/system/status_area_widget_delegate.h
diff --git a/ash/common/system/status_area_widget_delegate.h b/ash/common/system/status_area_widget_delegate.h
index 70a2f57d957e9a286feca1b88ad84ab13b848048..781c8c61a7680af79f58fd34dc74f3575f9bd98e 100644
--- a/ash/common/system/status_area_widget_delegate.h
+++ b/ash/common/system/status_area_widget_delegate.h
@@ -33,20 +33,8 @@ class ASH_EXPORT StatusAreaWidgetDelegate : public views::AccessiblePaneView,
 
   void set_alignment(ShelfAlignment alignment) { alignment_ = alignment; }
 
-  void set_custom_focus_traversable(
-      views::FocusTraversable* custom_focus_traversable) {
-    custom_focus_traversable_ = custom_focus_traversable;
-  }
-
-  void set_default_last_focusable_child(bool default_last_focusable_child) {
-    default_last_focusable_child_ = default_last_focusable_child;
-  }
-
   // Overridden from views::AccessiblePaneView.
   View* GetDefaultFocusableChild() override;
-  views::FocusSearch* GetFocusSearch() override;
-  views::FocusTraversable* GetFocusTraversableParent() override;
-  views::View* GetFocusTraversableParentView() override;
 
   // Overridden from views::View:
   views::Widget* GetWidget() override;
@@ -72,12 +60,6 @@ class ASH_EXPORT StatusAreaWidgetDelegate : public views::AccessiblePaneView,
   // screen.
   void SetBorderOnChild(views::View* child, bool extend_border_to_edge);
 
-  views::FocusTraversable* custom_focus_traversable_ = nullptr;
-
-  // When true, the default focus of the status area widget is the last
-  // focusable child.
-  bool default_last_focusable_child_ = false;
-
   const FocusCycler* focus_cycler_for_testing_;
 
   // TODO(jamescook): Get this from WmShelf.