convert BitVector to use pointer size blocks

tools/gyp/v8.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 345 matching lines @@
         '../../src/background-parsing-task.cc',
         '../../src/background-parsing-task.h',
         '../../src/bailout-reason.cc',
         '../../src/bailout-reason.h',
         '../../src/basic-block-profiler.cc',
         '../../src/basic-block-profiler.h',
         '../../src/bignum-dtoa.cc',
         '../../src/bignum-dtoa.h',
         '../../src/bignum.cc',
         '../../src/bignum.h',
+        '../../src/bit-vector.cc',
+        '../../src/bit-vector.h',
         '../../src/bootstrapper.cc',
         '../../src/bootstrapper.h',
         '../../src/builtins.cc',
         '../../src/builtins.h',
         '../../src/bytecodes-irregexp.h',
         '../../src/cached-powers.cc',
         '../../src/cached-powers.h',
         '../../src/char-predicates.cc',
         '../../src/char-predicates-inl.h',
         '../../src/char-predicates.h',
@@ skipping 133 matching lines @@
         '../../src/contexts.cc',
         '../../src/contexts.h',
         '../../src/conversions-inl.h',
         '../../src/conversions.cc',
         '../../src/conversions.h',
         '../../src/counters.cc',
         '../../src/counters.h',
         '../../src/cpu-profiler-inl.h',
         '../../src/cpu-profiler.cc',
         '../../src/cpu-profiler.h',
-        '../../src/data-flow.cc',
-        '../../src/data-flow.h',
         '../../src/date.cc',
         '../../src/date.h',
         '../../src/dateparser-inl.h',
         '../../src/dateparser.cc',
         '../../src/dateparser.h',
         '../../src/debug.cc',
         '../../src/debug.h',
         '../../src/deoptimizer.cc',
         '../../src/deoptimizer.h',
         '../../src/disasm.h',
@@ skipping 1197 matching lines @@
         }],
         ['v8_compress_startup_data=="bz2"', {
           'libraries': [
             '-lbz2',
           ]
         }],
       ],
     },
   ],
 }