Cleanup machine based on the state in configuration file for mini installer test.

chrome/test/mini_installer/file_verifier.py

-# Copyright 2013 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 verifier
-
-
-class FileVerifier(verifier.Verifier):
-  """Verifies that the current files match the expectation dictionaries."""
-
-  def _VerifyExpectation(self, expectation_name, expectation,
-                         variable_expander):
-    """Overridden from verifier.Verifier.
-
-    This method will throw an AssertionError if file state doesn't match the
-    |expectation|.
-
-    Args:
-      expectation_name: Path to the file being verified. It is expanded using
-          Expand.
-      expectation: A dictionary with the following key and value:
-          'exists' a boolean indicating whether the file should exist.
-      variable_expander: A VariableExpander object.
-    """
-    file_path = variable_expander.Expand(expectation_name)
-    file_exists = os.path.exists(file_path)
-    assert expectation['exists'] == file_exists, \
-        ('File %s exists' % file_path) if file_exists else \
-        ('File %s is missing' % file_path)