[LayoutNG] Pull out of flow candidate loop into out of flow layout part.

third_party/WebKit/Source/core/layout/ng/ng_out_of_flow_layout_part.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 NGOutOfFlowLayoutPart_h
 #define NGOutOfFlowLayoutPart_h
 
 #include "core/CoreExport.h"
 
 #include "core/layout/ng/ng_absolute_utils.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_layout_algorithm.h"
 #include "core/layout/ng/ng_units.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Optional.h"
 
 namespace blink {
 
 class ComputedStyle;
 class NGBlockNode;
 class NGFragment;
+class NGFragmentBuilder;
 class NGConstraintSpace;
 
 // Helper class for positioning of out-of-flow blocks.
 // It should be used together with NGFragmentBuilder.
 // See NGFragmentBuilder::AddOutOfFlowChildCandidate documentation
 // for example of using these classes together.
-class CORE_EXPORT NGOutOfFlowLayoutPart
-    : public GarbageCollectedFinalized<NGOutOfFlowLayoutPart> {
+class CORE_EXPORT NGOutOfFlowLayoutPart {
+  STACK_ALLOCATED();
+
  public:
-  NGOutOfFlowLayoutPart(PassRefPtr<const ComputedStyle>, NGLogicalSize);
-
-  void Layout(NGBlockNode&, NGStaticPosition, NGFragment**, NGLogicalOffset*);
-
-  DECLARE_TRACE();
+  NGOutOfFlowLayoutPart(const ComputedStyle& container_style,
+                        NGFragmentBuilder* container_builder);
+  void Run();
 
  private:
+  NGFragment* LayoutDescendant(NGBlockNode& descendant,
+                               NGStaticPosition static_position,
+                               NGLogicalOffset* offset);
+
   NGFragment* GenerateFragment(NGBlockNode& node,
                                const Optional<LayoutUnit>& block_estimate,
                                const NGAbsolutePhysicalPosition node_position);
 
-  NGLogicalOffset parent_border_offset_;
-  NGPhysicalOffset parent_border_physical_offset_;
-  Member<NGConstraintSpace> parent_space_;
+  const ComputedStyle& container_style_;
+  Member<NGFragmentBuilder> container_builder_;
+
+  NGLogicalOffset container_border_offset_;
+  NGPhysicalOffset container_border_physical_offset_;
+  Member<NGConstraintSpace> container_space_;
 };
 
 }  // namespace blink
 
 #endif