[LayoutNG] Change core/layout/ng to Chromium style and rename files.

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

Index: third_party/WebKit/Source/core/layout/ng/NGMarginStrut.h
diff --git a/third_party/WebKit/Source/core/layout/ng/NGMarginStrut.h b/third_party/WebKit/Source/core/layout/ng/NGMarginStrut.h
deleted file mode 100644
index 80ffe4afd2a9424eba331458b6dac02b3ed17c78..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/layout/ng/NGMarginStrut.h
+++ /dev/null
@@ -1,24 +0,0 @@
-// 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 NGMarginStrut_h
-#define NGMarginStrut_h
-
-#include "core/CoreExport.h"
-#include "platform/LayoutUnit.h"
-
-namespace blink {
-
-// This struct is used for the margin collapsing calculation.
-struct NGMarginStrut {
-    LayoutUnit marginBlockStart;
-    LayoutUnit marginBlockEnd;
-
-    LayoutUnit negativeMarginBlockStart;
-    LayoutUnit negativeMarginBlockEnd;
-};
-
-} // namespace blink
-
-#endif // NGMarginStrut_h