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

third_party/tcmalloc/vendor/src/malloc_hook-inl.h

 // Copyright (c) 2005, 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 23 matching lines @@
 // to use malloc-hook inside the tcmalloc system.  It does not hold
 // any of the client-facing calls that are used to add new hooks.
 
 #ifndef _MALLOC_HOOK_INL_H_
 #define _MALLOC_HOOK_INL_H_
 
 #include <stddef.h>
 #include <sys/types.h>
 #include "base/atomicops.h"
 #include "base/basictypes.h"
-#include <google/malloc_hook.h>
+#include <gperftools/malloc_hook.h>
 
 namespace base { namespace internal {
 
 // The following (implementation) code is DEPRECATED.
 // A simple atomic pointer class that can be initialized by the linker
 // when you define a namespace-scope variable as:
 //
 //   AtomicPtr<Foo*> my_global = { &initial_value };
 //
 // This isn't suitable for a general atomic<> class because of the
@@ skipping 258 matching lines @@
   if (!base::internal::sbrk_hooks_.empty() && increment != 0) {
     InvokeSbrkHookSlow(result, increment);
   }
   // The following code is DEPRECATED.
   MallocHook::SbrkHook hook = MallocHook::GetSbrkHook();
   if (hook != NULL && increment != 0) (*hook)(result, increment);
   // End DEPRECATED code.
 }
 
 #endif /* _MALLOC_HOOK_INL_H_ */