[layoutng] Move and rename NGBoxMargins to NGBoxStrut

third_party/WebKit/Source/core/layout/ng/ng_length_utils.cc

 // 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.
 
 #include "core/layout/ng/ng_length_utils.h"
 
 #include "core/layout/ng/ng_constraint_space.h"
-#include "core/layout/ng/ng_margin_strut.h"
 #include "core/style/ComputedStyle.h"
 #include "platform/LayoutUnit.h"
 #include "platform/Length.h"
 
 namespace blink {
 // TODO(layout-ng):
 // - Handle border-box correctly
 // - positioned and/or replaced calculations
 // - Handle margins for fill-available and width: auto
 
@@ skipping 90 matching lines @@
                                       contentSize, LengthResolveType::MinSize);
   extent = std::max(extent, min);
 
   if (style.boxSizing() == BoxSizingContentBox) {
     // TODO(layout-ng): Compute border/padding size and add it
   }
 
   return extent;
 }
 
-NGBoxMargins computeMargins(const NGConstraintSpace& constraintSpace,
-                            const ComputedStyle& style) {
+NGBoxStrut computeMargins(const NGConstraintSpace& constraintSpace,
+                          const ComputedStyle& style) {
   // Margins always get computed relative to the inline size:
   // https://www.w3.org/TR/CSS2/box.html#value-def-margin-width
-  NGBoxMargins margins;
+  NGBoxStrut margins;
   margins.inline_start = resolveInlineLength(
       constraintSpace, style.marginStart(), LengthResolveType::MarginSize);
   margins.inline_end = resolveInlineLength(constraintSpace, style.marginEnd(),
                                            LengthResolveType::MarginSize);
   margins.block_start = resolveInlineLength(
       constraintSpace, style.marginBefore(), LengthResolveType::MarginSize);
   margins.block_end = resolveInlineLength(constraintSpace, style.marginAfter(),
                                           LengthResolveType::MarginSize);
   return margins;
 }
 
 }  // namespace blink