Start sorting methods in class declarations.

base/base.gypi

 # Copyright (c) 2011 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,
     },
     'target_conditions': [
@@ skipping 129 matching lines @@
           'native_library.h',
           'native_library_linux.cc',
           'native_library_mac.mm',
           'native_library_win.cc',
           'observer_list.h',
           'observer_list_threadsafe.h',
           'path_service.cc',
           'path_service.h',
           'pickle.cc',
           'pickle.h',
+          'platform_file.cc',
           'platform_file.h',
           'platform_file_posix.cc',
           'platform_file_win.cc',
           'port.h',
           'process.h',
           'process_linux.cc',
           'process_posix.cc',
           'process_util.cc',
           'process_util.h',
           'process_util_linux.cc',
@@ skipping 567 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',
           ],
         },
       ],
     }],
   ],
 }