Revert of Remove catapult_base from telemetry.

tools/telemetry/catapult_base/util.py

+# Copyright 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 GetCatapultDir():
+  return os.path.normpath(os.path.join(
+      os.path.dirname(__file__), '..', '..', '..', 'third_party', 'catapult'))
+
+
+def IsRunningOnCrosDevice():
+  """Returns True if we're on a ChromeOS device."""
+  lsb_release = '/etc/lsb-release'
+  if sys.platform.startswith('linux') and os.path.exists(lsb_release):
+    with open(lsb_release, 'r') as f:
+      res = f.read()
+      if res.count('CHROMEOS_RELEASE_NAME'):
+        return True
+  return False
+
+
+def IsExecutable(path):
+  return os.path.isfile(path) and os.access(path, os.X_OK)