[layout-ng] Convert ng_block_layout_algorithm to yield to the coordinator

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

Index: third_party/WebKit/Source/core/layout/ng/ng_legacy_block_layout_algorithm.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_legacy_block_layout_algorithm.h b/third_party/WebKit/Source/core/layout/ng/ng_legacy_block_layout_algorithm.h
new file mode 100644
index 0000000000000000000000000000000000000000..c0147c11da89f06382174a62881cf0201c75a238
--- /dev/null
+++ b/third_party/WebKit/Source/core/layout/ng/ng_legacy_block_layout_algorithm.h
@@ -0,0 +1,34 @@
+// 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 NGLegacyBlockLayoutAlgorithm_h
+#define NGLegacyBlockLayoutAlgorithm_h
+
+#include "core/CoreExport.h"
+#include "core/layout/ng/ng_block_node.h"
+#include "core/layout/ng/ng_constraint_space.h"
+#include "core/layout/ng/ng_layout_algorithm.h"
+#include "wtf/RefPtr.h"
+
+namespace blink {
+
+// A class for legacy block layout (blocks that can't be handled by NG yet).
+// Defers to the old layout method of the block
+class CORE_EXPORT NGLegacyBlockLayoutAlgorithm : public NGLayoutAlgorithm {
+ public:
+  NGLegacyBlockLayoutAlgorithm(NGBlockNode*, const NGConstraintSpace*);
+
+  NGLayoutStatus Layout(NGPhysicalFragmentBase*,
+                        NGPhysicalFragmentBase**,
+                        NGLayoutAlgorithm**) override;
+
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  Member<NGBlockNode> block_;
+  Member<const NGConstraintSpace> constraint_space_;
+};
+}
+
+#endif  // NGLegacyBlockLayoutAlgorithm_h