[LayoutNG] Add NGConstraintSpaceBuilder class.

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

Index: third_party/WebKit/Source/core/layout/ng/ng_physical_constraint_space.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_physical_constraint_space.h b/third_party/WebKit/Source/core/layout/ng/ng_physical_constraint_space.h
index 5d6a335db42c1c9924b8c0d067bcbf1bf45cbf18..9ee6640ae281ec7c87024a73cae1b4cdd6f0d155 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_physical_constraint_space.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_physical_constraint_space.h
@@ -60,6 +60,16 @@ struct NGExclusion : public GarbageCollected<NGExclusion> {
 class CORE_EXPORT NGPhysicalConstraintSpace final
     : public GarbageCollectedFinalized<NGPhysicalConstraintSpace> {
  public:
+  NGPhysicalConstraintSpace(
+      NGPhysicalSize container_size,
+      bool fixed_width,
+      bool fixed_height,
+      bool width_direction_triggers_scrollbar,
+      bool height_direction_triggers_scrollbar,
+      NGFragmentationType width_direction_fragmentation_type,
+      NGFragmentationType height_direction_fragmentation_type,
+      bool is_new_fc);
+
   NGPhysicalConstraintSpace();
   NGPhysicalConstraintSpace(NGPhysicalSize);