[LayoutNG] Move NGConstraintSpaceBuilder off Oilpan and DISALLOW_NEW.

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

Index: third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.h b/third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.h
index 3a82c44d014f0d6b6f2fc774586c3b93dbe407a0..c6aafd0f3bedf4da06aa127aa0fba9bf47179612 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_fragment_builder.h
@@ -10,6 +10,7 @@
 #include "core/layout/ng/ng_floating_object.h"
 #include "core/layout/ng/ng_physical_fragment.h"
 #include "core/layout/ng/ng_units.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
@@ -17,6 +18,8 @@ class NGLayoutResult;
 class NGPhysicalTextFragment;
 
 class CORE_EXPORT NGFragmentBuilder final {
+  DISALLOW_NEW();
+
  public:
   NGFragmentBuilder(NGPhysicalFragment::NGFragmentType, NGLayoutInputNode*);