Make NGFragmentBuilder to keep track on text children.

third_party/WebKit/Source/core/layout/ng/ng_line_builder.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 NGLineBuilder_h
 #define NGLineBuilder_h
 
 #include "core/CoreExport.h"
 #include "core/layout/ng/geometry/ng_logical_offset.h"
+#include "core/layout/ng/ng_fragment_builder.h"
 #include "core/layout/ng/ng_layout_opportunity_iterator.h"
 #include "core/layout/ng/ng_physical_fragment.h"
 #include "platform/fonts/FontBaseline.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class ComputedStyle;
 class FontMetrics;
 class NGConstraintSpace;
-class NGFragmentBuilder;
 class NGInlineNode;
 class NGLayoutInlineItem;
 
 // NGLineBuilder creates the fragment tree for a line.
 // NGLineBuilder manages the current line as a range, |start| and |end|.
 // |end| can be extended multiple times before creating a line, usually until
 // |!CanFitOnLine()|.
 // |SetBreakOpportunity| can mark the last confirmed offset that can fit.
 class CORE_EXPORT NGLineBuilder final {
   STACK_ALLOCATED();
@@ skipping 104 matching lines @@
   void AccumulateUsedFonts(const NGLayoutInlineItem&,
                            const LineItemChunk&,
                            LineBoxData*);
 
   // Finds the next layout opportunity for the next text fragment.
   void FindNextLayoutOpportunity();
 
   Persistent<NGInlineNode> inline_box_;
   NGConstraintSpace* constraint_space_;  // Not owned as STACK_ALLOCATED.
   NGFragmentBuilder* containing_block_builder_;
-  Vector<RefPtr<NGPhysicalFragment>, 32> fragments_;
-  Vector<NGLogicalOffset, 32> offsets_;
   Vector<LineBoxData, 32> line_box_data_list_;
   unsigned start_index_ = 0;
   unsigned start_offset_ = 0;
   unsigned last_index_ = 0;
   unsigned end_offset_ = 0;
   unsigned last_break_opportunity_index_ = 0;
   unsigned last_break_opportunity_offset_ = 0;
   LayoutUnit end_position_;
   LayoutUnit last_break_opportunity_position_;
   LayoutUnit content_size_;
   LayoutUnit max_inline_size_;
   FontBaseline baseline_type_;
+  NGFragmentBuilder container_builder_;
+  RefPtr<NGLayoutResult> container_layout_result_;
 
   NGLogicalOffset bfc_offset_;
   NGLogicalRect current_opportunity_;
 
 #if DCHECK_IS_ON()
   unsigned is_bidi_reordered_ : 1;
 #endif
 };
 
 }  // namespace blink
 
 #endif  // NGLineBuilder_h