Revert of Remove catapult_base from telemetry.

tools/telemetry/catapult_base/dependency_manager/local_path_info.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
+
+
+class LocalPathInfo(object):
+
+  def __init__(self, path_priority_groups):
+    self._path_priority_groups = self._ParseLocalPaths(path_priority_groups)
+
+  def GetLocalPath(self):
+    for priority_group in self._path_priority_groups:
+      priority_group = filter(os.path.exists, priority_group)
+      if not priority_group:
+        continue
+      return max(priority_group, key=lambda path: os.stat(path).st_mtime)
+    return None
+
+  def IsPathInLocalPaths(self, path):
+    return any(
+        path in priority_group for priority_group in self._path_priority_groups)
+
+  def Update(self, local_path_info):
+    if not local_path_info:
+      return
+    for priority_group in local_path_info._path_priority_groups:
+      group_list = []
+      for path in priority_group:
+        if not self.IsPathInLocalPaths(path):
+          group_list.append(path)
+      if group_list:
+        self._path_priority_groups.append(group_list)
+
+  @staticmethod
+  def _ParseLocalPaths(local_paths):
+    if not local_paths:
+      return []
+    return [[e] if isinstance(e, basestring) else e for e in local_paths]