Remove Skia's forked buildbot code

slave/skia_slave_scripts/flavor_utils/valgrind_build_step_utils.py

-# Copyright (c) 2013 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.
-
-""" Utilities for Valgrind build steps. """
-
-from default_build_step_utils import DefaultBuildStepUtils
-from py.utils import shell_utils
-
-import os
-
-
-class ValgrindBuildStepUtils(DefaultBuildStepUtils):
-  def __init__(self, build_step_instance):
-    DefaultBuildStepUtils.__init__(self, build_step_instance)
-    self._suppressions_file = os.path.join('tools', 'valgrind.supp')
-
-  def RunFlavoredCmd(self, app, args):
-    """ Override this in new BuildStep flavors. """
-    cmd = ['valgrind', '--gen-suppressions=all', '--leak-check=no',
-           '--track-origins=yes', '--error-exitcode=1']
-    if self._suppressions_file:
-      cmd.append('--suppressions=%s' % self._suppressions_file)
-
-    cmd.append(self._PathToBinary(app))
-    cmd.extend(args)
-    return shell_utils.run(cmd)
-
-  def Compile(self, target):
-    os.environ['GYP_DEFINES'] = self._step.args['gyp_defines']
-    print 'GYP_DEFINES="%s"' % os.environ['GYP_DEFINES']
-    make_cmd = 'make'
-    if os.name == 'nt':
-      make_cmd = 'make.bat'
-    cmd = [make_cmd,
-           target,
-           'BUILDTYPE=%s' % self._step.configuration,
-           ]
-    cmd.extend(self._step.default_make_flags)
-    cmd.extend(self._step.make_flags)
-    shell_utils.run(cmd)