Update OOM killer with Lion info.

third_party/apple_apsl/malloc.h

 /*
  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * compliance with the License. Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this
@@ skipping 27 matching lines @@
     void        (*destroy)(struct _malloc_zone_t *zone); /* zone is destroyed and all memory reclaimed */
     const char  *zone_name;
 
     /* Optional batch callbacks; these may be NULL */
     unsigned    (*batch_malloc)(struct _malloc_zone_t *zone, size_t size, void **results, unsigned num_requested); /* given a size, returns pointers capable of holding that size; returns the number of pointers allocated (maybe 0 or less than num_requested) */
     void        (*batch_free)(struct _malloc_zone_t *zone, void **to_be_freed, unsigned num_to_be_freed); /* frees all the pointers in to_be_freed; note that to_be_freed may be overwritten during the process */
 
     struct malloc_introspection_t       *introspect;
     unsigned    version;
     
-    /* aligned memory allocation. The callback may be NULL. */
-        void *(*memalign)(struct _malloc_zone_t *zone, size_t alignment, size_t size);  // version >= 5
+    /* aligned memory allocation. The callback may be NULL. Present in version >= 5. */
+    void *(*memalign)(struct _malloc_zone_t *zone, size_t alignment, size_t size);
     
-    /* free a pointer known to be in zone and known to have the given size. The callback may be NULL. */
-    void (*free_definite_size)(struct _malloc_zone_t *zone, void *ptr, size_t size);  // version >= 6
+    /* free a pointer known to be in zone and known to have the given size. The callback may be NULL. Present in version >= 6.*/
+    void (*free_definite_size)(struct _malloc_zone_t *zone, void *ptr, size_t size);
+
+    /* Empty out caches in the face of memory pressure. The callback may be NULL. Present in version >= 8. */
+    size_t      (*pressure_relief)(struct _malloc_zone_t *zone, size_t goal);
 } ChromeMallocZone;
 
 #endif  // THIRD_PARTY_APPLE_APSL_MALLOC_H_