message: meshable-arena: one way mapping
diff: @@ -40,10 +40,10 @@ enum PageType {
  };
  } // namespace internal
  -class MeshableArena : public mesh::MmapHeap {
  +class MeshableArena : public mesh::OneWayMmapHeap {
  private:
  DISALLOW_COPY_AND_ASSIGN(MeshableArena);
  - typedef MmapHeap SuperHeap;
  + typedef OneWayMmapHeap SuperHeap;
  public:
  enum { Alignment = MmapWrapper::Alignment };
  