Move the number conversions from string_util to a new file....

base/base.gypi

 # Copyright (c) 2010 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.
 
 {
   'target_defaults': {
     'variables': {
       'base_target': 0,
       'base_extra_target': 0,
     },
@@ skipping 198 matching lines @@
           'shared_memory_win.cc',
           'simple_thread.cc',
           'simple_thread.h',
           'singleton.h',
           'spin_wait.h',
           'stack_container.h',
           'stats_counters.h',
           'stats_table.cc',
           'stats_table.h',
           'stl_util-inl.h',
+          'string_number_conversions.cc',
+          'string_number_conversions.h',
           'string_piece.cc',
           'string_piece.h',
           'string_split.cc',
           'string_split.h',
           'string_tokenizer.h',
           'string_util.cc',
           'string_util.h',
           'string_util_win.h',
           'sys_info.h',
           'sys_info_chromeos.cc',
@@ skipping 512 matching lines @@
             'third_party/xdg_mime/xdgmimemagic.c',
             'third_party/xdg_mime/xdgmimemagic.h',
             'third_party/xdg_mime/xdgmimeparent.c',
             'third_party/xdg_mime/xdgmimeparent.h',
           ],
         },
       ],
     }],
   ],
 }