Revert auto-hide-invisible mode for ARC++

ash/common/shelf/shelf_layout_manager.h

Index: ash/common/shelf/shelf_layout_manager.h
diff --git a/ash/common/shelf/shelf_layout_manager.h b/ash/common/shelf/shelf_layout_manager.h
index 557f5fd4be91ce1fd77dbf7282a02dbb1743836b..8209e5b93e2ffb297a3a73171058b3295ba7fdc3 100644
--- a/ash/common/shelf/shelf_layout_manager.h
+++ b/ash/common/shelf/shelf_layout_manager.h
@@ -15,7 +15,6 @@
 #include "ash/common/wm/background_animator.h"
 #include "ash/common/wm/dock/docked_window_layout_manager_observer.h"
 #include "ash/common/wm/lock_state_observer.h"
-#include "ash/common/wm/window_state.h"
 #include "ash/common/wm/wm_snap_to_pixel_layout_manager.h"
 #include "ash/common/wm/workspace/workspace_types.h"
 #include "ash/common/wm_activation_observer.h"
@@ -293,7 +292,6 @@ class ASH_EXPORT ShelfLayoutManager
   // Returns true if there is a fullscreen window open that causes the shelf
   // to be hidden.
   bool IsShelfHiddenForFullscreen() const;
-  ash::wm::WindowState::FullscreenShelfMode GetShelfModeForFullscreen() const;
 
   // Gesture related functions:
   void StartGestureDrag(const ui::GestureEvent& gesture);
@@ -301,8 +299,6 @@ class ASH_EXPORT ShelfLayoutManager
   void CompleteGestureDrag(const ui::GestureEvent& gesture);
   void CancelGestureDrag();
 
-  int GetShelfInsetsForAutoHide() const;
-
   // True when inside UpdateBoundsAndOpacity() method. Used to prevent calling
   // UpdateBoundsAndOpacity() again from SetChildBounds().
   bool updating_bounds_;
@@ -368,10 +364,6 @@ class ASH_EXPORT ShelfLayoutManager
   // The show hide animation duration override or 0 for default.
   int duration_override_in_ms_;
 
-  // The flag to enforce invisible shelf (as in MD-experiemntal).
-  // TODO(oshima): Remove this when MD immersive is launched.
-  bool invisible_auto_hide_shelf_ = false;
-
   DISALLOW_COPY_AND_ASSIGN(ShelfLayoutManager);
 };