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

third_party/WebKit/Source/core/layout/ng/NGBlockLayoutAlgorithm.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 NGBlockLayoutAlgorithm_h
-#define NGBlockLayoutAlgorithm_h
-
-#include "wtf/RefPtr.h"
-
-namespace blink {
-
-class ComputedStyle;
-class LayoutBox;
-class NGConstraintSpace;
-class NGFragment;
-
-// A class for general block layout (e.g. a <div> with no special style).
-// Lays out the children in sequence.
-class NGBlockLayoutAlgorithm {
-public:
-    NGBlockLayoutAlgorithm(const ComputedStyle*);
-
-    // Actual layout implementation. Lays out the children in sequence within
-    // the constraints given by the NGConstraintSpace. Returns a fragment
-    // with the resulting layout information.
-    // This function can not be const because for interruptible layout, we have
-    // to be able to store state information.
-    NGFragment* layout(const NGConstraintSpace&);
-private:
-    RefPtr<const ComputedStyle> m_style;
-};
-
-} // namespace blink
-
-#endif // NGBlockLayoutAlgorithm_h