[LayoutNG] Make NG algorithms non-oilpan.

third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.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_layout_input_node.h"
-
-#include "core/layout/ng/ng_block_layout_algorithm.h"
-#include "core/layout/ng/ng_block_node.h"
-#include "core/layout/ng/ng_constraint_space.h"
-#include "core/layout/ng/ng_inline_layout_algorithm.h"
-#include "core/layout/ng/ng_inline_node.h"
-#include "core/layout/ng/ng_layout_algorithm.h"
-#include "core/layout/ng/ng_legacy_block_layout_algorithm.h"
-#include "core/style/ComputedStyle.h"
-
-namespace blink {
-
-NGLayoutAlgorithm* NGLayoutInputNode::AlgorithmForInputNode(
-    NGLayoutInputNode* input_node,
-    NGConstraintSpace* constraint_space) {
-  // At least for now, this should never be called on LegacyInline
-  // children. However, there will be other kinds of input_node so
-  // it makes sense to do this here.
-  DCHECK(input_node->Type() == kLegacyBlock);
-  NGBlockNode* block = toNGBlockNode(input_node);
-  if (!block->CanUseNewLayout())
-    return new NGLegacyBlockLayoutAlgorithm(block, constraint_space);
-  const ComputedStyle& style = block->Style();
-  LayoutObject* layout_object = input_node->GetLayoutObject();
-  if (block->HasInlineChildren()) {
-    NGInlineNode* child = toNGInlineNode(block->FirstChild());
-    return new NGInlineLayoutAlgorithm(layout_object, &style, child,
-                                       constraint_space);
-  }
-  NGBlockNode* child = toNGBlockNode(block->FirstChild());
-  // TODO(layout-ng): The break token should be passed as an argument to this
-  // method instead of getting it from the NGBlockNode
-  NGBreakToken* token = block->CurrentBreakToken();
-  return new NGBlockLayoutAlgorithm(layout_object, &style, child,
-                                    constraint_space, token);
-}
-}