Add CT isolate file and CT script that will be run on swarming slaves

content/test/ct/path_util.py

 # Copyright (c) 2015 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 os
 import sys
 
 
-def GetChromiumSrcDir():
-  return os.path.abspath(os.path.join(
-      os.path.dirname(__file__), os.pardir, os.pardir, os.pardir, os.pardir))
-
-
-def GetGpuTestDir():
-  return os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
-
-
 def AddDirToPathIfNeeded(*path_parts):
   path = os.path.abspath(os.path.join(*path_parts))
   if os.path.isdir(path) and path not in sys.path:
     sys.path.append(path)
+
+
+def GetChromiumSrcDir():
+  return os.path.abspath(os.path.join(
+      os.path.dirname(__file__), os.pardir, os.pardir, os.pardir))