[LayoutNG] Allow block-flow layout to be fragmented using new approach.

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

Index: third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h b/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
index 0c36cdefccd5759495e1b6912b7853aa6553fc1b..3751663977d551b83d274340c887b9f34fc1ef91 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_layout_input_node.h
@@ -11,6 +11,7 @@
 namespace blink {
 
 class LayoutObject;
+class NGBreakToken;
 class NGConstraintSpace;
 class NGLayoutResult;
 
@@ -25,7 +26,7 @@ class CORE_EXPORT NGLayoutInputNode
   virtual ~NGLayoutInputNode(){};
 
   // Performs layout on this input node, will return the layout result.
-  virtual RefPtr<NGLayoutResult> Layout(NGConstraintSpace*) = 0;
+  virtual RefPtr<NGLayoutResult> Layout(NGConstraintSpace*, NGBreakToken*) = 0;
 
   // Returns the next sibling.
   virtual NGLayoutInputNode* NextSibling() = 0;