Use new common utils where possible.

slave/skia_slave_scripts/update_all_buildslave_checkouts.py

 #!/usr/bin/env python
 # Copyright (c) 2014 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.
 
 
 """Update the buildbot checkouts for each buildslave on every host.
 
 This differs from UpdateScripts in that it updates ALL of the buildbot script
 checkouts for ALL buildslaves, as opposed to a single buildslave's checkout of
 the buildbot scripts on a single host machine.
 """
 
 
 import re
 import skia_vars
 import sys
 
 from build_step import BuildStep, BuildStepWarning
+from scripts import run_cmd
 from utils import force_update_checkout
-from utils import misc
-
-sys.path.append(misc.BUILDBOT_PATH)
-
-from scripts import run_cmd
 
 
 BUILDBOT_GIT_URL = skia_vars.GetGlobalVariable('buildbot_git_url')
 
 
 class UpdateAllBuildslaves(BuildStep):
   def _Run(self):
     script_path = run_cmd.ResolvablePath('slave', 'skia_slave_scripts', 'utils',
                                          'force_update_checkout.py')
     sync_cmd = ['python', script_path]
@@ skipping 42 matching lines @@
         print ' ', failed_host
 
     if failed:
       # TODO(borenet): Make sure that we can log in to all hosts, then make this
       # an error.
       raise BuildStepWarning('Could not update some buildslaves.')
 
 
 if '__main__' == __name__:
   sys.exit(BuildStep.RunBuildStep(UpdateAllBuildslaves))