Use new common utils where possible.

slave/skia_slave_scripts/flavor_utils/arm64model_build_step_utils.py

 # 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.
 
 import datetime
 import os
 import sys
 
-from utils import shell_utils
-from utils import ssh_utils
+from py.utils import shell_utils
+from py.utils import ssh_utils
 from flavor_utils.ssh_build_step_utils import SshBuildStepUtils
 
 class Arm64ModelBuildStepUtils(SshBuildStepUtils):
   # make sure deps_target_os = 'barelinux' so that all dependencies
   # can be installed.
   def __init__(self, build_step_instance):
     SshBuildStepUtils.__init__(self, build_step_instance)
 
     self._remote_dir = 'skia'
     self._build_dir = os.path.join('out', 'config', 'arm64linux')
@@ skipping 41 matching lines @@
 
     make_cmd = [
       'sh', '-x',
       os.path.join(platform_bin, 'arm64_make'),
       '-o', self._build_dir,
       '-c', os.path.join(toolchain_bin, 'aarch64-linux-gnu-gcc'),
       '-x', os.path.join(toolchain_bin, 'aarch64-linux-gnu-g++'),
       '-t', self._step.configuration,
       ]
     shell_utils.run(make_cmd)