Update shelf spacing in Chrome OS according to the MD specs

ash/shelf/shelf_layout_manager.h

Index: ash/shelf/shelf_layout_manager.h
diff --git a/ash/shelf/shelf_layout_manager.h b/ash/shelf/shelf_layout_manager.h
index 9a141128223209f469a5122af61fdaaaf04117cc..15d4559f23b37d8b4004cb162d410bc65ece016c 100644
--- a/ash/shelf/shelf_layout_manager.h
+++ b/ash/shelf/shelf_layout_manager.h
@@ -69,20 +69,6 @@ class ASH_EXPORT ShelfLayoutManager
       public SnapToPixelLayoutManager,
       public SessionStateObserver {
  public:
-  // We reserve a small area on the edge of the workspace area to ensure that
-  // the resize handle at the edge of the window can be hit.
-  static const int kWorkspaceAreaVisibleInset;
-
-  // When autohidden we extend the touch hit target onto the screen so that the
-  // user can drag the shelf out.
-  static const int kWorkspaceAreaAutoHideInset;
-
-  // Size of the shelf when auto-hidden.
-  static const int kAutoHideSize;
-
-  // Inset between the inner edge of the shelf (towards centre of screen), and
-  // the shelf items, notifications, status area etc.
-  static const int kShelfItemInset;
 
   explicit ShelfLayoutManager(ShelfWidget* shelf_widget);
   ~ShelfLayoutManager() override;