Changed statement ZoneList to a ZoneChunkList

src/compiler/store-store-elimination.cc

Index: src/compiler/store-store-elimination.cc
diff --git a/src/compiler/store-store-elimination.cc b/src/compiler/store-store-elimination.cc
index 196cb0d60819e861c1dd5a0744b416007a8d5124..0ec9d98eff788ac7e61dc4c372e99ac47ec7582d 100644
--- a/src/compiler/store-store-elimination.cc
+++ b/src/compiler/store-store-elimination.cc
@@ -473,8 +473,7 @@ UnobservablesSet UnobservablesSet::VisitedEmpty(Zone* zone) {
   // Create a new empty UnobservablesSet. This allocates in the zone, and
   // can probably be optimized to use a global singleton.
   ZoneSet<UnobservableStore>* empty_set =
-      new (zone->New(sizeof(ZoneSet<UnobservableStore>)))
-          ZoneSet<UnobservableStore>(zone);
+      new (zone) ZoneSet<UnobservableStore>(zone);
   return UnobservablesSet(empty_set);
 }
 
@@ -487,8 +486,7 @@ UnobservablesSet UnobservablesSet::Intersect(UnobservablesSet other,
     return Unvisited();
   } else {
     ZoneSet<UnobservableStore>* intersection =
-        new (zone->New(sizeof(ZoneSet<UnobservableStore>)))
-            ZoneSet<UnobservableStore>(zone);
+        new (zone) ZoneSet<UnobservableStore>(zone);
     // Put the intersection of set() and other.set() in intersection.
     set_intersection(set()->begin(), set()->end(), other.set()->begin(),
                      other.set()->end(),
@@ -506,8 +504,7 @@ UnobservablesSet UnobservablesSet::Add(UnobservableStore obs,
   } else {
     // Make a new empty set.
     ZoneSet<UnobservableStore>* new_set =
-        new (zone->New(sizeof(ZoneSet<UnobservableStore>)))
-            ZoneSet<UnobservableStore>(zone);
+        new (zone) ZoneSet<UnobservableStore>(zone);
     // Copy the old elements over.
     *new_set = *set();
     // Add the new element.
@@ -523,8 +520,7 @@ UnobservablesSet UnobservablesSet::RemoveSameOffset(StoreOffset offset,
                                                     Zone* zone) const {
   // Make a new empty set.
   ZoneSet<UnobservableStore>* new_set =
-      new (zone->New(sizeof(ZoneSet<UnobservableStore>)))
-          ZoneSet<UnobservableStore>(zone);
+      new (zone) ZoneSet<UnobservableStore>(zone);
   // Copy all elements over that have a different offset.
   for (auto obs : *set()) {
     if (obs.offset_ != offset) {