[LayoutNG] Initial implementation of NGBoxIterator

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

Index: third_party/WebKit/Source/core/layout/ng/ng_box_iterator.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_box_iterator.h b/third_party/WebKit/Source/core/layout/ng/ng_box_iterator.h
new file mode 100644
index 0000000000000000000000000000000000000000..cf5d75a887c98552e36576337d4df1ba9623289a
--- /dev/null
+++ b/third_party/WebKit/Source/core/layout/ng/ng_box_iterator.h
@@ -0,0 +1,28 @@
+// 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 NGBoxIterator_h
+#define NGBoxIterator_h
+
+#include "core/layout/LayoutObject.h"
+
+namespace blink {
+
+class NGBox;
+
+class NGBoxIterator {

[cbiesinger, 2016/08/10 19:55:24]

Can you add a comment saying that this will iterator over the siblings of the
layout object?

[Gleb Lanbin, 2016/08/10 20:11:44]

Done.

+ public:
+  explicit NGBoxIterator(const LayoutObject*);
+  NGBox first();
+  NGBox next();
+
+ private:
+  void reset();
+
+  const LayoutObject* m_layoutObject;
+  const LayoutObject* m_currentChild;
+};
+
+}  // namespace blink
+#endif  // NGBoxIterator_h