Remove Gay's dtoa from sources.

tools/gyp/v8.gyp

 # Copyright 2009 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 315 matching lines @@
         '../../src/dateparser-inl.h',
         '../../src/debug.cc',
         '../../src/debug.h',
         '../../src/debug-agent.cc',
         '../../src/debug-agent.h',
         '../../src/disasm.h',
         '../../src/disassembler.cc',
         '../../src/disassembler.h',
         '../../src/dtoa.cc',
         '../../src/dtoa.h',
-        '../../src/dtoa-config.c',
         '../../src/diy-fp.cc',
         '../../src/diy-fp.h',
         '../../src/double.h',
         '../../src/execution.cc',
         '../../src/execution.h',
         '../../src/factory.cc',
         '../../src/factory.h',
         '../../src/fast-dtoa.cc',
         '../../src/fast-dtoa.h',
         '../../src/flag-definitions.h',
@@ skipping 303 matching lines @@
           'sources': [
             '../../src/platform-macos.cc',
             '../../src/platform-posix.cc'
           ]},
         ],
         ['OS=="win"', {
           'sources': [
             '../../src/platform-win32.cc',
           ],
           # 4355, 4800 came from common.vsprops
-          # 4018, 4244 were a per file config on dtoa-config.c
-          # TODO: It's probably possible and desirable to stop disabling the
-          # dtoa-specific warnings by modifying dtoa as was done in Chromium
-          # r9255.  Refer to that revision for details.
-          'msvs_disabled_warnings': [4355, 4800, 4018, 4244],
+          'msvs_disabled_warnings': [4355, 4800],
           'link_settings':  {
             'libraries': [ '-lwinmm.lib' ],
           },
         }],
         ['OS=="win" and component=="shared_library"', {
           'defines': [
             'BUILDING_V8_SHARED'
           ],
         }],
       ],
@@ skipping 75 matching lines @@
       ],
       'conditions': [
         ['OS=="win"', {
           # This could be gotten by not setting chromium_code, if that's OK.
           'defines': ['_CRT_SECURE_NO_WARNINGS'],
         }],
       ],
     },
   ],
 }