scons: excise more scons references from the code base

site_scons/site_tools/chromium_builders.py

-# 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.
-
-"""
-Tool module for adding, to a construction environment, Chromium-specific
-wrappers around SCons builders.  This gives us a central place for any
-customization we need to make to the different things we build.
-"""
-
-import sys
-
-from SCons.Script import *
-
-class Null(object):
-  def __new__(cls, *args, **kwargs):
-    if '_inst' not in vars(cls):
-      cls._inst = super(type, cls).__new__(cls, *args, **kwargs)
-    return cls._inst
-  def __init__(self, *args, **kwargs): pass
-  def __call__(self, *args, **kwargs): return self
-  def __repr__(self): return "Null()"
-  def __nonzero__(self): return False
-  def __getattr__(self, name): return self
-  def __setattr__(self, name, val): return self
-  def __delattr__(self, name): return self
-  def __getitem__(self, name): return self
-
-
-def generate(env):
-  # Add the grit tool to the base environment because we use this a lot.
-  sys.path.append(env.Dir('$SRC_DIR/tools/grit').abspath)
-  env.Tool('scons', toolpath=[env.Dir('$SRC_DIR/tools/grit/grit')])
-
-  # Add the repack python script tool that we use in multiple places.
-  sys.path.append(env.Dir('$SRC_DIR/tools/data_pack').abspath)
-  env.Tool('scons', toolpath=[env.Dir('$SRC_DIR/tools/data_pack/')])
-
-def exists(env):
-  return True