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

third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc

Index: third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc b/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
index 4cc561fde043a492d7e96d8f5a81a61dc6331017..5a1abf690a32b83b879a9620ae4030864001183c 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
+++ b/third_party/WebKit/Source/core/layout/ng/ng_constraint_space.cc
@@ -25,6 +25,7 @@ NGConstraintSpace::NGConstraintSpace(
     bool is_block_direction_triggers_scrollbar,
     NGFragmentationType block_direction_fragmentation_type,
     bool is_new_fc,
+    bool is_anonymous,
     const NGMarginStrut& margin_strut,
     const NGLogicalOffset& bfc_offset,
     const std::shared_ptr<NGExclusions>& exclusions,
@@ -42,6 +43,7 @@ NGConstraintSpace::NGConstraintSpace(
           is_block_direction_triggers_scrollbar),
       block_direction_fragmentation_type_(block_direction_fragmentation_type),
       is_new_fc_(is_new_fc),
+      is_anonymous_(is_anonymous),
       writing_mode_(writing_mode),
       direction_(static_cast<unsigned>(direction)),
       margin_strut_(margin_strut),