[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