[LayoutNG] Remove the ng_layout_coordinator and temporary LayoutSync method.

third_party/WebKit/Source/core/layout/ng/ng_layout_coordinator.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_coordinator.h"
-
-#include "core/layout/ng/ng_layout_input_node.h"
-#include "core/layout/ng/ng_physical_fragment.h"
-
-namespace blink {
-
-NGLayoutCoordinator::NGLayoutCoordinator(NGLayoutInputNode* input_node,
-                                         NGConstraintSpace* constraint_space) {
-  layout_algorithms_.push_back(
-      NGLayoutInputNode::AlgorithmForInputNode(input_node, constraint_space));
-}
-
-bool NGLayoutCoordinator::Tick(NGPhysicalFragment** out_fragment) {
-  NGLayoutAlgorithm* child_algorithm;
-
-  // Tick should never be called without a layout algorithm on the stack.
-  DCHECK(layout_algorithms_.size());
-
-  NGPhysicalFragment* fragment;
-  NGPhysicalFragment* in_fragment = fragment_;
-  fragment_ = nullptr;
-
-  switch (layout_algorithms_.back()->Layout(in_fragment, &fragment,
-                                            &child_algorithm)) {
-    case kNotFinished:
-      return false;
-    case kNewFragment:
-      layout_algorithms_.pop_back();
-      if (layout_algorithms_.size() == 0) {
-        *out_fragment = fragment;
-        return true;
-      }
-      fragment_ = fragment;
-      return false;
-    case kChildAlgorithmRequired:
-      layout_algorithms_.push_back(child_algorithm);
-      return false;
-  }
-
-  NOTREACHED();
-  return false;
-}
-
-DEFINE_TRACE(NGLayoutCoordinator) {
-  visitor->trace(layout_algorithms_);
-  visitor->trace(fragment_);
-}
-}