Revert of [LayoutNG] Move remaining ng_units structs to their own files

third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part.h

 // Copyright 2016 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 NGOutOfFlowLayoutPart_h
 #define NGOutOfFlowLayoutPart_h
 
 #include "core/CoreExport.h"
 
 #include "core/layout/ng/ng_absolute_utils.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_layout_algorithm.h"
+#include "core/layout/ng/ng_units.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Optional.h"
 
 namespace blink {
 
 class ComputedStyle;
 class NGBlockNode;
 class NGFragmentBuilder;
 class NGConstraintSpace;
 class NGLayoutResult;
@@ skipping 25 matching lines @@
   NGFragmentBuilder* container_builder_;
 
   NGLogicalOffset container_border_offset_;
   NGPhysicalOffset container_border_physical_offset_;
   Member<NGConstraintSpace> container_space_;
 };
 
 }  // namespace blink
 
 #endif