Merge tcmalloc r111 (perftools v. 1.8) with the chromium/ branch.

third_party/tcmalloc/chromium/src/google/malloc_extension_c.h

 /* Copyright (c) 2008, Google Inc.
  * 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
@@ skipping 62 matching lines @@
 
 PERFTOOLS_DLL_DECL int MallocExtension_GetNumericProperty(const char* property, size_t* value);
 PERFTOOLS_DLL_DECL int MallocExtension_SetNumericProperty(const char* property, size_t value);
 PERFTOOLS_DLL_DECL void MallocExtension_MarkThreadIdle(void);
 PERFTOOLS_DLL_DECL void MallocExtension_MarkThreadBusy(void);
 PERFTOOLS_DLL_DECL void MallocExtension_ReleaseToSystem(size_t num_bytes);
 PERFTOOLS_DLL_DECL void MallocExtension_ReleaseFreeMemory(void);
 PERFTOOLS_DLL_DECL size_t MallocExtension_GetEstimatedAllocatedSize(size_t size);
 PERFTOOLS_DLL_DECL size_t MallocExtension_GetAllocatedSize(void* p);
 
+/*
+ * NOTE: These enum values MUST be kept in sync with the version in
+ *       malloc_extension.h
+ */
+typedef enum {
+  MallocExtension_kUnknownOwnership = 0,
+  MallocExtension_kOwned,
+  MallocExtension_kNotOwned
+} MallocExtension_Ownership;
+
+PERFTOOLS_DLL_DECL MallocExtension_Ownership MallocExtension_GetOwnership(const void* p);
+
 #ifdef __cplusplus
 }   // extern "C"
 #endif
 
 #endif /* _MALLOC_EXTENSION_C_H_ */