[LayoutNG] Remove the ng_layout_coordinator and temporary LayoutSync method.

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

 // 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 NGBlockLayoutAlgorithm_h
 #define NGBlockLayoutAlgorithm_h
 
 #include "core/CoreExport.h"
 #include "core/layout/ng/ng_block_node.h"
 #include "core/layout/ng/ng_layout_algorithm.h"
 #include "core/layout/ng/ng_units.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class ComputedStyle;
 class NGBlockBreakToken;
 class NGBreakToken;
 class NGColumnMapper;
 class NGConstraintSpace;
 class NGConstraintSpaceBuilder;
 class NGBoxFragment;
+class NGFragment;
 class NGFragmentBuilder;
 class NGPhysicalFragment;
 
 // A class for general block layout (e.g. a <div> with no special style).
 // Lays out the children in sequence.
 class CORE_EXPORT NGBlockLayoutAlgorithm : public NGLayoutAlgorithm {
  public:
   // Default constructor.
   // @param style Style reference of the block that is being laid out.
   // @param first_child Our first child; the algorithm will use its NextSibling
   //                    method to access all the children.
   // @param space The constraint space which the algorithm should generate a
   //              fragment within.
   NGBlockLayoutAlgorithm(PassRefPtr<const ComputedStyle>,
                          NGBlockNode* first_child,
                          NGConstraintSpace* space,
                          NGBreakToken* break_token = nullptr);
 
   bool ComputeMinAndMaxContentSizes(MinAndMaxContentSizes*) override;
-  NGLayoutStatus Layout(NGPhysicalFragment*,
-                        NGPhysicalFragment**,
-                        NGLayoutAlgorithm**) override;
+  NGPhysicalFragment* Layout() override;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   // Creates a new constraint space for the current child.
   NGConstraintSpace* CreateConstraintSpaceForCurrentChild() const;
   void FinishCurrentChildLayout(NGFragment* fragment);
   HeapLinkedHashSet<WeakMember<NGBlockNode>> LayoutOutOfFlowChildren();
 
   // Proceed to the next sibling that still needs layout.
@@ skipping 114 matching lines @@
   // MarginStrut for the previous child.
   NGMarginStrut prev_child_margin_strut_;
   // Whether the block-start was set for the currently built
   // fragment's margin strut.
   bool is_fragment_margin_strut_block_start_updated_ : 1;
 };
 
 }  // namespace blink
 
 #endif  // NGBlockLayoutAlgorithm_h