Convert from using env['PLATFORM'] directly to using the more flexible...

build/googleurl_unittests.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 the googleurl_unittests{,.exe} executable.
 """
 
 Import('env')
 
 env = env.Clone()
 
 env.SConscript([
     '$BASE_DIR/using_base.scons',
     '$ICU38_DIR/using_icu38.scons',
     '$GTEST_DIR/../using_gtest.scons',
     '$CHROME_SRC_DIR/build/using_googleurl.scons',
 ], {'env':env})
 
 env.Prepend(
     CPPPATH = [
         '$CHROME_SRC_DIR',
     ],
 )
 
-if env['PLATFORM'] == 'win32':
+if env.Bit('windows'):
   env.Append(
       CCFLAGS = [
           '/TP',
       ],
   )
 
 input_files = [
     'src/gurl_unittest.cc',
     'src/url_canon_unittest.cc',
     'src/url_parse_unittest.cc',
     'src/url_util_unittest.cc',
     '$OBJ_ROOT/base/run_all_unittests$OBJSUFFIX',
 ]
 
 gurl_unittests = env.ChromeTestProgram('googleurl_unittests', input_files)
 
 installed_gurl_unittests = env.Install('$TARGET_ROOT', gurl_unittests)
 
 env.Alias('googleurl', installed_gurl_unittests)