[LayoutNG] Add units structures

third_party/WebKit/Source/core/layout/ng/NGUnits.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 NGUnits_h
+#define NGUnits_h
+
+namespace blink {
+
+class LayoutUnit;
+
+struct NGLogicalSize {
+    LayoutUnit inlineSize;
+    LayoutUnit blockSize;
+};
+
+struct NGLogicalOffset {
+    LayoutUnit inlineOffset;
+    LayoutUnit blockOffset;
+};
+
+struct NGPhysicalSize {
+    LayoutUnit width;
+    LayoutUnit height;
+};
+
+struct NGPhysicalLocation {
+    LayoutUnit x;
+    LayoutUnit y;

[ikilpatrick, 2016/08/09 16:21:56]

If we want to be as close to the css specs as possible; we'll probably want this
to be top, left.

[cbiesinger, 2016/08/09 16:36:43]

Done.

+};
+

[eae, 2016/08/09 16:19:39]

Add NGPhysicalRect (in addition) and a NGPixelSnappedRect (instead of the pixel
snapped size and location as one cannot snap the one without the other).

[cbiesinger, 2016/08/09 16:36:43]

Done.

+struct NGPixelSnappedPhysicalSize {
+    int width;
+    int height;
+};
+
+struct NGPixelSnappedPhysicalLocation {
+    int x;
+    int y;
+};
+
+} // namespace blink
+
+#endif // NGUnits_h