Make NGFragmentBuilder to keep track on text children.

third_party/WebKit/Source/core/layout/ng/ng_fragment_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 NGFragmentBuilder_h
 #define NGFragmentBuilder_h
 
 #include "core/layout/ng/ng_break_token.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_floating_object.h"
 #include "core/layout/ng/ng_physical_fragment.h"
+#include "core/layout/ng/ng_physical_text_fragment.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
 class NGLayoutResult;
-class NGPhysicalTextFragment;
 
 class CORE_EXPORT NGFragmentBuilder final {
   DISALLOW_NEW();
 
  public:
   NGFragmentBuilder(NGPhysicalFragment::NGFragmentType, NGLayoutInputNode*);
 
   using WeakBoxList = PersistentHeapLinkedHashSet<WeakMember<NGBlockNode>>;
 
   NGFragmentBuilder& SetWritingMode(NGWritingMode);
@@ skipping 68 matching lines @@
 
   // Offsets are not supposed to be set during fragment construction, so we
   // do not provide a setter here.
 
   // Creates the fragment. Can only be called once.
   RefPtr<NGLayoutResult> ToBoxFragment();
   RefPtr<NGPhysicalTextFragment> ToTextFragment(unsigned index,
                                                 unsigned start_offset,
                                                 unsigned end_offset);
 
+  Vector<RefPtr<NGPhysicalFragment>>& MutableChildren() { return children_; }
+
+  Vector<NGLogicalOffset>& MutableOffsets() { return offsets_; }
+
   // Mutable list of floats that need to be positioned.
   Vector<RefPtr<NGFloatingObject>>& MutableUnpositionedFloats() {
     return unpositioned_floats_;
   }
 
   // List of floats that need to be positioned.
   const Vector<RefPtr<NGFloatingObject>>& UnpositionedFloats() const {
     return unpositioned_floats_;
   }
 
   const WTF::Optional<NGLogicalOffset>& BfcOffset() const {
     return bfc_offset_;
   }
 
+  const Vector<RefPtr<NGPhysicalFragment>>& Children() const {
+    return children_;
+  }
+
   bool DidBreak() const { return did_break_; }
 
  private:
   // Out-of-flow descendant placement information.
   // The generated fragment must compute NGStaticPosition for all
   // out-of-flow descendants.
   // The resulting NGStaticPosition gets derived from:
   // 1. The offset of fragment's child.
   // 2. The static position of descendant wrt child.
   //
@@ skipping 38 matching lines @@
   Vector<NGLogicalOffset> floating_object_offsets_;
   Vector<RefPtr<NGFloatingObject>> positioned_floats_;
 
   WTF::Optional<NGLogicalOffset> bfc_offset_;
   NGMarginStrut end_margin_strut_;
 };
 
 }  // namespace blink
 
 #endif  // NGFragmentBuilder