Refactor allocation policies.

src/zone-inl.h

Index: src/zone-inl.h
diff --git a/src/zone-inl.h b/src/zone-inl.h
index 6e2d558a60625a1fb055c6a5c52ffd5bc44ec622..90817dad1b5778f514a995926b85dbc175adecfe 100644
--- a/src/zone-inl.h
+++ b/src/zone-inl.h
@@ -86,7 +86,7 @@ ZoneSplayTree<Config>::~ZoneSplayTree() {
   // Reset the root to avoid unneeded iteration over all tree nodes
   // in the destructor.  For a zone-allocated tree, nodes will be
   // freed by the Zone.
-  SplayTree<Config, ZoneListAllocationPolicy>::ResetRoot();
+  SplayTree<Config, ZoneListAllocator>::ResetRoot();
 }
 
 
@@ -102,20 +102,20 @@ void* ZoneObject::operator new(size_t size, Zone* zone) {
 }
 
 
-inline void* ZoneListAllocationPolicy::New(int size) {
+inline void* ZoneListAllocator::New(int size) {
   return ZONE->New(size);
 }
 
 
 template <typename T>
-void* ZoneList<T>::operator new(size_t size) {
-  return ZONE->New(static_cast<int>(size));
+void* ZoneList<T>::operator new(size_t size, Zone* zone) {
+  return zone->New(static_cast<int>(size));
 }
 
 
-template <typename T>
-void* ZoneList<T>::operator new(size_t size, Zone* zone) {
-  return zone->New(static_cast<int>(size));
+template<typename T>
+ZoneList<T>* ZoneList<T>::New(Zone* zone, int capacity) {
+  return new(zone) ZoneList(zone, capacity);
 }