Update the tcmalloc vendor branch to r144 (gperftools 2.0), and README.chromium.

third_party/tcmalloc/vendor/src/libc_override.h

 // Copyright (c) 2011, 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 37 matching lines @@
 // matters too, so we have a different file for each libc, and often
 // for different compilers and OS's.
 
 #ifndef TCMALLOC_LIBC_OVERRIDE_INL_H_
 #define TCMALLOC_LIBC_OVERRIDE_INL_H_
 
 #include <config.h>
 #ifdef HAVE_FEATURES_H
 #include <features.h>   // for __GLIBC__
 #endif
-#include <google/tcmalloc.h>
+#include <gperftools/tcmalloc.h>
 
 static void ReplaceSystemAlloc();  // defined in the .h files below
 
 // For windows, there are two ways to get tcmalloc.  If we're
 // patching, then src/windows/patch_function.cc will do the necessary
 // overriding here.  Otherwise, we doing the 'redefine' trick, where
 // we remove malloc/new/etc from mscvcrt.dll, and just need to define
 // them now.
 #if defined(_WIN32) && defined(WIN32_DO_PATCHING)
 void PatchWindowsFunctions();   // in src/windows/patch_function.cc
@@ skipping 12 matching lines @@
 // ones I know of do, so for now just assume they all do.
 #elif defined(__GNUC__)
 #include "libc_override_gcc_and_weak.h"
 
 #else
 #error Need to add support for your libc/OS here
 
 #endif
 
 #endif  // TCMALLOC_LIBC_OVERRIDE_INL_H_