Add third_party/apple_apsl from https://crrev.com/328418

third_party/apple_apsl/malloc.h

Index: third_party/apple_apsl/malloc.h
diff --git a/third_party/apple_apsl/malloc.h b/third_party/apple_apsl/malloc.h
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+/*
+ * 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
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef THIRD_PARTY_APPLE_APSL_MALLOC_H_
+#define THIRD_PARTY_APPLE_APSL_MALLOC_H_
+
+typedef struct _ChromeMallocZone {
+    /* Only zone implementors should depend on the layout of this structure;
+    Regular callers should use the access functions below */
+    void	*reserved1;	/* RESERVED FOR CFAllocator DO NOT USE */
+    void	*reserved2;	/* RESERVED FOR CFAllocator DO NOT USE */
+    size_t 	(*size)(struct _malloc_zone_t *zone, const void *ptr); /* returns the size of a block or 0 if not in this zone; must be fast, especially for negative answers */
+    void 	*(*malloc)(struct _malloc_zone_t *zone, size_t size);
+    void 	*(*calloc)(struct _malloc_zone_t *zone, size_t num_items, size_t size); /* same as malloc, but block returned is set to zero */
+    void 	*(*valloc)(struct _malloc_zone_t *zone, size_t size); /* same as malloc, but block returned is set to zero and is guaranteed to be page aligned */
+    void 	(*free)(struct _malloc_zone_t *zone, void *ptr);
+    void 	*(*realloc)(struct _malloc_zone_t *zone, void *ptr, size_t size);
+    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. 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. 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_