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

third_party/WebKit/Source/core/layout/ng/geometry/ng_logical_rect.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/geometry/ng_logical_rect.h"
-
-#include "wtf/text/WTFString.h"
-
-namespace blink {
-
-bool NGLogicalRect::IsEmpty() const {
-  return size.IsEmpty();
-}
-
-bool NGLogicalRect::IsContained(const NGLogicalRect& other) const {
-  return !(InlineEndOffset() <= other.InlineStartOffset() ||
-           BlockEndOffset() <= other.BlockStartOffset() ||
-           InlineStartOffset() >= other.InlineEndOffset() ||
-           BlockStartOffset() >= other.BlockEndOffset());
-}
-
-bool NGLogicalRect::operator==(const NGLogicalRect& other) const {
-  return std::tie(other.offset, other.size) == std::tie(offset, size);
-}
-
-String NGLogicalRect::ToString() const {
-  return String::format("%s,%s %sx%s",
-                        offset.inline_offset.toString().ascii().data(),
-                        offset.block_offset.toString().ascii().data(),
-                        size.inline_size.toString().ascii().data(),
-                        size.block_size.toString().ascii().data());
-}
-
-std::ostream& operator<<(std::ostream& os, const NGLogicalRect& value) {
-  return os << value.ToString();
-}
-
-}  // namespace blink