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

chrome/common/ipc_tests.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.
 
 Import('env', 'env')
 
 env = env.Clone()
 
 env.SConscript([
     '$BASE_DIR/using_base.scons',
     '$BREAKPAD_DIR/using_breakpad.scons',
     '$CHROME_DIR/third_party/wtl/using_wtl.scons',
     '$GTEST_DIR/../using_gtest.scons',
     '$ICU38_DIR/using_icu38.scons',
     '$LIBJPEG_DIR/using_libjpeg.scons',
     '$LIBPNG_DIR/using_libpng.scons',
     '$LIBXML_DIR/using_libxml.scons',
     '$NPAPI_DIR/using_npapi.scons',
     '$SKIA_DIR/using_skia.scons',
     '$ZLIB_DIR/using_zlib.scons',
 ], {'env':env})
 
-if env['PLATFORM'] in ('posix', 'darwin'):
+if env.Bit('posix'):
   env.SConscript([
       '$LIBEVENT_DIR/using_libevent.scons',
   ], {'env':env})
 
 # TODO(sgk):  convert into a using_*.scons pattern when we update WebKit.
 env.Append(
     CPPPATH = [
         '$WEBKIT_DIR/build/localized_strings',
     ],
 )
 
 env.Prepend(
     CPPPATH = [
         '$CHROME_DIR/app/resources',
         '$CHROME_DIR/app',
         '$CHROME_SRC_DIR',
     ],
     LIBS = [
         'common',
     ]
 )
 
-if env['PLATFORM'] == 'win32':
+if env.Bit('windows'):
   env.Prepend(
       CPPPATH = [
           '$CHROME_DIR/tools/build/win',
       ],
   )
 
-if env['PLATFORM'] == 'win32':
+if env.Bit('windows'):
   env.Append(
       LINKFLAGS = [
           '/INCREMENTAL',
 
           '/safeseh',
           '/dynamicbase',
           '/ignore:4199',
           '/nxcompat',
 
           '/DELAYLOAD:"dwmapi.dll"',
@@ skipping 13 matching lines @@
 input_files = [
     'ipc_fuzzing_tests.cc',
     'ipc_tests.cc',
 
     '$BASE_DIR/perftimer$OBJSUFFIX',
 ]
 
 ipc_tests = env.ChromeTestProgram('ipc_tests', input_files)
 i = env.Install('$TARGET_ROOT', ipc_tests)
 Alias('chrome', i)