convert BitVector to use pointer size blocks

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # TODO(jochen): These will need to be user-settable to support standalone V8
 # builds.
 v8_compress_startup_data = "off"
 v8_deprecation_warnings = false
 v8_enable_disassembler = false
 v8_enable_gdbjit = false
@@ skipping 432 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 829 matching lines @@
     deps = [
       ":v8_base",
       ":v8_nosnapshot",
     ]
   }
 
   direct_dependent_configs = [ ":external_config" ]
 }
 
 }