Finish replicating the *.vsprops structure.

base/base_lib.scons

 # Copyright (c) 2006-2008 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.
 
 __doc__ = """
 Configuration for building base.lib / libbase.a.
 """
 
 Import('env')
 
 env = env.Clone()
 
-env.SConscript([
+env.ApplySConscript([
     '$ICU38_DIR/using_icu38.scons',
-], {'env':env})
-
-env.Prepend(
-    CPPPATH = [
-        '$CHROME_SRC_DIR',
-    ],
-)
+])
 
 if env['PLATFORM'] == 'win32':
   env.Prepend(
       CCFLAGS = [
-          '/TP',
           '/Wp64',
       ],
   )
 
 # These base files work on *all* platforms; files that don't work
 # cross-platform live below.
 input_files = [
     'at_exit.cc',
     'base_paths.cc',
     'base_switches.cc',
@@ skipping 174 matching lines @@
       'hmac_nss.cc',
       'message_pump_glib.cc',
       'nss_init.cc',
       'process_posix.cc',
       'process_util_linux.cc',
       'sys_string_conversions_linux.cc',
       'worker_pool.cc',
   ])
 
 env.ChromeStaticLibrary('base', input_files)