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

net/net_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 net.lib / libnet.a.
 """
 
 Import('env')
 
@@ skipping 84 matching lines @@
     'url_request/url_request_http_job.cc',
     'url_request/url_request_job.cc',
     'url_request/url_request_job_manager.cc',
     'url_request/url_request_job_metrics.cc',
     'url_request/url_request_job_tracker.cc',
     'url_request/url_request_simple_job.cc',
     'url_request/url_request_test_job.cc',
     'url_request/url_request_view_cache_job.cc',
 ]
 
-if env['PLATFORM'] in ('posix', 'darwin'):
+if env.Bit('posix'):
   # Remove files that still need to be ported from the input_files list.
   # TODO(port): delete files from this list as they get ported.
   to_be_ported_files = [
       'base/ssl_config_service.cc',
       'http/http_transaction_winhttp.cc',
       'http/winhttp_request_throttle.cc',
       'url_request/url_request_ftp_job.cc',
   ]
   for remove in to_be_ported_files:
       input_files.remove(remove)
 
-if env['PLATFORM'] == 'win32':
+if env.Bit('windows'):
   input_files.extend([
       'base/file_stream_win.cc',
       'base/net_util_win.cc',
       'base/platform_mime_util_win.cc',
       'base/ssl_client_socket_win.cc',
       'base/tcp_client_socket_win.cc',
       'base/wininet_util.cc',
       'base/winsock_init.cc',
       'base/x509_certificate_win.cc',
       'disk_cache/cache_util_win.cc',
       'disk_cache/file_win.cc',
       'disk_cache/mapped_file_win.cc',
       'proxy/proxy_resolver_winhttp.cc',
       'url_request/url_request_inet_job.cc',
   ])
 
-if env['PLATFORM'] == 'darwin':
+if env.Bit('mac'):
   input_files.extend([
       'base/platform_mime_util_mac.cc',
       'base/ssl_client_socket_mac.cc',
       'base/x509_certificate_mac.cc',
       'proxy/proxy_resolver_mac.cc',
   ])
 
-if env['PLATFORM'] == 'posix':
+if env.Bit('linux'):
   input_files.extend([
       'base/nss_memio.c',
       # TODO(tc): gnome-vfs? xdgmime? /etc/mime.types?
       'base/platform_mime_util_linux.cc',
       'base/ssl_client_socket_nss.cc',
       'base/x509_certificate_nss.cc',
   ])
 
-if env['PLATFORM'] in ('darwin', 'posix'):
+if env.Bit('posix'):
   input_files.extend([
       'base/file_stream_posix.cc',
       'base/net_util_posix.cc',
       'base/tcp_client_socket_libevent.cc',
       'disk_cache/cache_util_posix.cc',
       'disk_cache/file_posix.cc',
       'disk_cache/mapped_file_posix.cc',
   ])
 
-if env['PLATFORM'] == 'win32':
+if env.Bit('windows'):
   # TODO(bradnelson): This step generates file precompiled_net.pch.ib_tag
   #                   possibly only on incredibuild, scons doesn't know this.
   env_p = env.Clone()
   env_p.Append(CCFLAGS='/Ylnet')
   pch, obj = env_p.PCH('precompiled_net.pch', 'build/precompiled_net.cc')
   env['PCH'] = pch
   env['PCHSTOP'] = 'precompiled_net.h'
   env.Append(CCPCHFLAGS = ['/FIprecompiled_net.h'])
   input_files += [obj]
 
 env.ChromeStaticLibrary('net', input_files)