revert thread isolate in PreallocatedStorageAllocationPolicy

src/zone.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 156 matching lines @@
 
  private:
   Zone* zone_;
 };
 
 
 // The ZoneAllocationPolicy is used to specialize generic data
 // structures to allocate themselves and their elements in the Zone.
 struct ZoneAllocationPolicy {
  public:
-  class Deleter {
-   public:
-    INLINE(explicit Deleter(const ZoneAllocationPolicy&)) {}
-    INLINE(static void Delete(void *pointer)) { }
-  };
   explicit ZoneAllocationPolicy(Zone* zone) : zone_(zone) { }
   INLINE(void* New(size_t size));
   INLINE(static void Delete(void *pointer)) { }
   Zone* zone() { return zone_; }
 
  private:
   Zone* zone_;
 };
 
 
@@ skipping 65 matching lines @@
   void operator delete(void* pointer) { UNREACHABLE(); }
   void operator delete(void* pointer, Zone* zone) { UNREACHABLE(); }
 };
 
 
 typedef TemplateHashMapImpl<ZoneAllocationPolicy> ZoneHashMap;
 
 } }  // namespace v8::internal
 
 #endif  // V8_ZONE_H_