[LayoutNG] A different approach to multi-col.

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

Index: third_party/WebKit/Source/core/layout/ng/ng_break_token.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_break_token.h b/third_party/WebKit/Source/core/layout/ng/ng_break_token.h
index 7a1778fbdd19448090df0b0e8091f0b4c041c180..51f77ea3bc8436bea2781ee24bfe28691d98affb 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_break_token.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_break_token.h
@@ -10,6 +10,8 @@
 
 namespace blink {
 
+class NGLayoutInputNode;
+
 class CORE_EXPORT NGBreakToken
     : public GarbageCollectedFinalized<NGBreakToken> {
  public:
@@ -18,13 +20,20 @@ class CORE_EXPORT NGBreakToken
   enum NGBreakTokenType { kBlockBreakToken, kTextBreakToken };
   NGBreakTokenType Type() const { return static_cast<NGBreakTokenType>(type_); }
 
-  DEFINE_INLINE_VIRTUAL_TRACE() {}
+  bool IsFinished() const { return is_finished_; }
+  NGLayoutInputNode* Node() const { return node_; }
+
+  DEFINE_INLINE_VIRTUAL_TRACE() { visitor->trace(node_); }
 
- protected:
-  NGBreakToken(NGBreakTokenType type) : type_(type) {}
+ public:  // protected:
+  NGBreakToken(NGBreakTokenType type, bool is_finished, NGLayoutInputNode* node)
+      : type_(type), is_finished_(is_finished), node_(node) {}
 
  private:
   unsigned type_ : 1;
+  unsigned is_finished_ : 1;
+
+  Member<NGLayoutInputNode> node_;
 };
 
 }  // namespace blink