Match whole path components in DevicePathToDriveLetterPath(). Add tests.

base/base.gypi

 # Copyright (c) 2012 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 385 matching lines @@
           'win/scoped_co_mem.h',
           'win/scoped_com_initializer.h',
           'win/scoped_comptr.h',
           'win/scoped_gdi_object.h',
           'win/scoped_handle.h',
           'win/scoped_hdc.h',
           'win/scoped_hglobal.h',
           'win/scoped_select_object.h',
           'win/scoped_variant.cc',
           'win/scoped_variant.h',
+          'win/win_api_interface.h',
+          'win/win_api_interface.cc',
           'win/windows_version.cc',
           'win/windows_version.h',
           'win/win_util.cc',
           'win/win_util.h',
           'win/wrapped_window_proc.cc',
           'win/wrapped_window_proc.h',
         ],
         'defines': [
           'BASE_IMPLEMENTATION',
         ],
@@ skipping 466 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',
           ],
         },
       ],
     }],
   ],
 }