Use new common utils where possible.

slave/skia_slave_scripts/utils/force_update_checkout.py

Index: slave/skia_slave_scripts/utils/force_update_checkout.py
diff --git a/slave/skia_slave_scripts/utils/force_update_checkout.py b/slave/skia_slave_scripts/utils/force_update_checkout.py
index 631d1c73bd6b3f18a72c5f7fa50387798e0f643e..a68f34aa581f7fe4f63277ded557055d61bafbf6 100644
--- a/slave/skia_slave_scripts/utils/force_update_checkout.py
+++ b/slave/skia_slave_scripts/utils/force_update_checkout.py
@@ -12,15 +12,19 @@ import os
 import shlex
 import sys
 
-import misc
+BUILDBOT_PATH = os.path.realpath(os.path.join(
+    os.path.dirname(os.path.abspath(__file__)), os.pardir, os.pardir, os.pardir)
+)
 
-sys.path.append(os.path.join(misc.BUILDBOT_PATH, 'site_config'))
-sys.path.append(os.path.join(misc.BUILDBOT_PATH, 'third_party',
+sys.path.append(os.path.join(BUILDBOT_PATH, 'common'))
+sys.path.append(os.path.join(BUILDBOT_PATH, 'site_config'))
+sys.path.append(os.path.join(BUILDBOT_PATH, 'third_party',
                              'chromium_buildbot', 'scripts'))
 
 import gclient_utils
-import git_utils
-import shell_utils
+from py.utils import git_utils
+from py.utils import misc
+from py.utils import shell_utils
 import skia_vars