Clean up NaCl's SCons build.

ppapi/native_client/tests/ppapi_messaging/build.scons

-# -*- python -*-
-# Copyright 2011 The Native Client Authors.  All rights reserved.
-# Use of this source code is governed by a BSD-style license that can
-# be found in the LICENSE file.
-
-# A way to build the nexe as a trusted plugin to validate directly
-# against Chrome on Linux and OS X using
-# --register-pepper-plugins="/path/to/libppapi_messaging.so;application/x-nacl"
-# http://localhost:5103/scons-out/nacl-x86-../staging/ppapi_messaging.html
-# Note that a trusted plugin is not built on Windows.
-
-Import('env')
-
-plugin_env = env.Clone()
-
-sources = ['ppapi_messaging.c']
-
-libs = ['imc',
-        'gio',
-        'pthread',
-        'platform'
-       ]
-
-trusted_plugin = None
-if plugin_env.Bit('linux'):  # linux, arm
-  trusted_plugin = plugin_env.DualLibrary('ppapi_messaging',
-                                               sources)
-elif plugin_env.Bit('mac'):  # os x
-  plugin_env.Append(
-      FRAMEWORKS = ['Cocoa'],
-      LINKFLAGS = ['-bundle', '-framework', 'Foundation']
-      )
-  plugin_env['tools'] = 'target_platform_mac'
-  REZ = '/Developer/Tools/Rez'
-  plugin_env.Command(target='ppapi_messaging.rsrc',
-                     source='ppapi_messaging.r',
-                     action=[Action(REZ + ' -o ${TARGET} ${SOURCE} -useDF')])
-  ppapi_messaging = plugin_env.ComponentProgram('ppapi_messaging',
-                                                sources,
-                                                EXTRA_LIBS=libs,
-                                                no_import_lib=True)
-  bundle_name = '${STAGING_DIR}/ppapi_messaging.bundle'
-  plugin_env.Alias('ppapi_messaging.bundle', [bundle_name])
-  plugin_env.Bundle(bundle_name,
-                    BUNDLE_EXE=ppapi_messaging,
-                    BUNDLE_PKGINFO_FILENAME=0,
-                    BUNDLE_RESOURCES='ppapi_messaging.rsrc',
-                    BUNDLE_INFO_PLIST='Info.plist')
-  trusted_plugin = bundle_name
-
-if not trusted_plugin == None:
-  # Note that the html is required to run this program.
-  nacltest_js = '${SCONSTRUCT_DIR}/tools/browser_tester/browserdata/nacltest.js'
-  dest_copy = plugin_env.Replicate('$STAGING_DIR',
-                                   ['ppapi_messaging.html',
-                                    'ppapi_messaging.nmf',
-                                    env.File(nacltest_js)]
-                                  )
-  plugin_env.Depends(trusted_plugin, dest_copy)
-