Revert 126715 - Update the tcmalloc vendor branch to r144 (gperftools 2.0).

third_party/tcmalloc/vendor/src/central_freelist.h

Index: third_party/tcmalloc/vendor/src/central_freelist.h
===================================================================
--- third_party/tcmalloc/vendor/src/central_freelist.h	(revision 126727)
+++ third_party/tcmalloc/vendor/src/central_freelist.h	(working copy)
@@ -48,11 +48,6 @@
 // Data kept per size-class in central cache.
 class CentralFreeList {
  public:
-  // A CentralFreeList may be used before its constructor runs.
-  // So we prevent lock_'s constructor from doing anything to the
-  // lock_ state.
-  CentralFreeList() : lock_(base::LINKER_INITIALIZED) { }
-
   void Init(size_t cl);
 
   // These methods all do internal locking.