Pool implementation for zone segments

src/zone/zone-segment.cc

Index: src/zone/zone-segment.cc
diff --git a/src/zone/zone-segment.cc b/src/zone/zone-segment.cc
index f63b530667a52723df7742cedefdded4603af882..1fa49d49ba8b328b86fc5d9e147edcc5060e7e4b 100644
--- a/src/zone/zone-segment.cc
+++ b/src/zone/zone-segment.cc
@@ -18,5 +18,6 @@ void Segment::ZapHeader() {
   memset(this, kZapDeadByte, sizeof(Segment));
 #endif
 }
+
 }  // namespace internal
 }  // namespace v8