[NOT TO COMMIT!] Replace third_party/tcmalloc/chromium with tcmalloc r136 (the latest).

third_party/tcmalloc/chromium/src/google/malloc_hook_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 117 matching lines @@
                                       const void* old_addr,
                                       size_t old_size,
                                       size_t new_size,
                                       int flags,
                                       const void* new_addr);
 PERFTOOLS_DLL_DECL
 int MallocHook_AddMremapHook(MallocHook_MremapHook hook);
 PERFTOOLS_DLL_DECL
 int MallocHook_RemoveMremapHook(MallocHook_MremapHook hook);
 
-typedef void (*MallocHook_PreSbrkHook)(std::ptrdiff_t increment);
+typedef void (*MallocHook_PreSbrkHook)(ptrdiff_t increment);
 PERFTOOLS_DLL_DECL
 int MallocHook_AddPreSbrkHook(MallocHook_PreSbrkHook hook);
 PERFTOOLS_DLL_DECL
 int MallocHook_RemovePreSbrkHook(MallocHook_PreSbrkHook hook);
 
-typedef void (*MallocHook_SbrkHook)(const void* result, std::ptrdiff_t increment);
+typedef void (*MallocHook_SbrkHook)(const void* result, ptrdiff_t increment);
 PERFTOOLS_DLL_DECL
 int MallocHook_AddSbrkHook(MallocHook_SbrkHook hook);
 PERFTOOLS_DLL_DECL
 int MallocHook_RemoveSbrkHook(MallocHook_SbrkHook hook);
 
 /* The following are DEPRECATED. */
 PERFTOOLS_DLL_DECL
 MallocHook_NewHook MallocHook_SetNewHook(MallocHook_NewHook hook);
 PERFTOOLS_DLL_DECL
 MallocHook_DeleteHook MallocHook_SetDeleteHook(MallocHook_DeleteHook hook);
 PERFTOOLS_DLL_DECL
 MallocHook_PreMmapHook MallocHook_SetPreMmapHook(MallocHook_PreMmapHook hook);
 PERFTOOLS_DLL_DECL
 MallocHook_MmapHook MallocHook_SetMmapHook(MallocHook_MmapHook hook);
 PERFTOOLS_DLL_DECL
 MallocHook_MunmapHook MallocHook_SetMunmapHook(MallocHook_MunmapHook hook);
 PERFTOOLS_DLL_DECL
 MallocHook_MremapHook MallocHook_SetMremapHook(MallocHook_MremapHook hook);
 PERFTOOLS_DLL_DECL
 MallocHook_PreSbrkHook MallocHook_SetPreSbrkHook(MallocHook_PreSbrkHook hook);
 PERFTOOLS_DLL_DECL
 MallocHook_SbrkHook MallocHook_SetSbrkHook(MallocHook_SbrkHook hook);
 /* End of DEPRECATED functions. */
 
 #ifdef __cplusplus
 }   // extern "C"
 #endif
 
 #endif /* _MALLOC_HOOK_C_H_ */