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

webkit/build/WebCore/SConscript

 # 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.Clone()
 
-if env['PLATFORM'] == 'win32':
+if env.Bit('windows'):
   env.Append(
     CCFLAGS = [
       '/TP',
       
       '/wd4138',
       '/wd4244',
       '/wd4291',
       '/wd4305',
       '/wd4521',
       '/wd4099',
       '/wd4800',
     ],
     CPPDEFINES = [
       '__STD_C',
     ],
   )
 
-if env['PLATFORM'] in ('darwin', 'posix'):
+if env.Bit('posix'):
   if '-Wall' in env['CXXFLAGS'] and '-Werror' in env['CXXFLAGS']:
     # It'd be nice to fix these warnings upstream, but we're not going to
     # block on it.
     env['CXXFLAGS'].remove('-Werror')
 
 env.Append(
     CPPPATH = [
         '$THIRD_PARTY_DIR/sqlite'
     ]
 )
@@ skipping 759 matching lines @@
     '$WEBCORE_DIR/xml/XPathValue.cpp',
     '$WEBCORE_DIR/xml/XPathVariableReference.cpp',
     '$WEBCORE_DIR/xml/XSLImportRule.cpp',
     '$WEBCORE_DIR/xml/XSLStyleSheet.cpp',
     '$WEBCORE_DIR/xml/XSLTExtensions.cpp',
     '$WEBCORE_DIR/xml/XSLTProcessor.cpp',
     '$WEBCORE_DIR/xml/XSLTUnicodeSort.cpp',
 ]
 
 # These files don't compile yet on linux or mac.
-if env['PLATFORM'] in ('darwin'):
+if env.Bit('mac'):
   remove_files = [
     # includes platform specific FontCustomPlatformData.h
     '$WEBCORE_DIR/css/CSSFontFaceSource.cpp',
     '$WEBCORE_DIR/loader/CachedFont.cpp',
   ]
   for remove in remove_files:
     input_files.remove(remove)
 
 # These files don't compile on the mac
-if env['PLATFORM'] in ('darwin'):
+if env.Bit('mac'):
   remove_files = [
     # Missing WebCore::FrameView::printPanScrollIcon
     '$WEBCORE_DIR/page/EventHandler.cpp',
   ]
   for remove in remove_files:
     input_files.remove(remove)
 
 # Precompiled headers only work under MSVC in scons.
-if env['PLATFORM'] == 'win32':
+if env.Bit('windows'):
   env_p = env.Clone()
   env_p.Append(CCFLAGS='/Ylwebcore')
   pch, obj = env_p.PCH('$OBJ_ROOT/webkit/build/precompiled_webkit.cc')
   env['PCH'] = pch
   env['PCHSTOP'] = 'precompiled_webkit.h'
   env.Append(CCPCHFLAGS = ['/FIprecompiled_webkit.h'])
   input_files += [obj]
 
 env.ChromeStaticLibrary('WebCore', input_files)