Remove unused class AssertNoZoneAllocation.

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 145 matching lines @@
   // require the operator to be visible. MSVC requires the delete
   // operator to be public.
 
   // ZoneObjects should never be deleted individually; use
   // Zone::DeleteAll() to delete all zone objects in one go.
   void operator delete(void*, size_t) { UNREACHABLE(); }
   void operator delete(void* pointer, Zone* zone) { UNREACHABLE(); }
 };
 
 
-class AssertNoZoneAllocation {
- public:
-  inline AssertNoZoneAllocation();
-  inline ~AssertNoZoneAllocation();
- private:
-  bool prev_;
-};
-
-
 // The ZoneListAllocationPolicy is used to specialize the GenericList
 // implementation to allocate ZoneLists and their elements in the
 // Zone.
 class ZoneListAllocationPolicy {
  public:
   // Allocate 'size' bytes of memory in the zone.
   static void* New(int size);
 
   // De-allocation attempts are silently ignored.
   static void Delete(void* p) { }
@@ skipping 59 matching lines @@
  public:
   ZoneSplayTree()
       : SplayTree<Config, ZoneListAllocationPolicy>() {}
   ~ZoneSplayTree();
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ZONE_H_