convert BitVector to use pointer size blocks

test/cctest/cctest.gyp

 # Copyright 2012 the V8 project authors. 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
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 84 matching lines @@
         'gay-shortest.cc',
         'print-extension.cc',
         'profiler-extension.cc',
         'test-accessors.cc',
         'test-alloc.cc',
         'test-api.cc',
         'test-ast.cc',
         'test-atomicops.cc',
         'test-bignum.cc',
         'test-bignum-dtoa.cc',
+        'test-bit-vector.cc',
         'test-checks.cc',
         'test-circular-queue.cc',
         'test-compiler.cc',
         'test-constantpool.cc',
         'test-conversions.cc',
         'test-cpu-profiler.cc',
-        'test-dataflow.cc',
         'test-date.cc',
         'test-debug.cc',
         'test-declarative-accessors.cc',
         'test-decls.cc',
         'test-deoptimization.cc',
         'test-dictionary.cc',
         'test-diy-fp.cc',
         'test-double.cc',
         'test-dtoa.cc',
         'test-fast-dtoa.cc',
@@ skipping 179 matching lines @@
             '<@(_outputs)',
             'TEST',  # type
             'off',  # compression
             '<@(file_list)',
           ],
         }
       ],
     },
   ],
 }