[LayoutNG] Make NG algorithms non-oilpan.

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

-// 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.
-
-#include "core/layout/ng/ng_legacy_block_layout_algorithm.h"
-
-#include "core/layout/ng/ng_physical_box_fragment.h"
-
-namespace blink {
-
-NGLegacyBlockLayoutAlgorithm::NGLegacyBlockLayoutAlgorithm(
-    NGBlockNode* block,
-    const NGConstraintSpace* constraint_space)
-    : NGLayoutAlgorithm(kLegacyBlockLayoutAlgorithm),
-      block_(block),
-      constraint_space_(constraint_space) {}
-
-NGPhysicalFragment* NGLegacyBlockLayoutAlgorithm::Layout() {
-  return block_->RunOldLayout(*constraint_space_);
-}
-
-DEFINE_TRACE(NGLegacyBlockLayoutAlgorithm) {
-  NGLayoutAlgorithm::trace(visitor);
-  visitor->trace(block_);
-  visitor->trace(constraint_space_);
-}
-}