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

chrome/test/mini_installer/registry_verifier.py

Index: chrome/test/mini_installer/registry_verifier.py
diff --git a/chrome/test/mini_installer/registry_verifier.py b/chrome/test/mini_installer/registry_verifier.py
index bd790d574823082202e3bc5c5eda561b9b2e1abb..7fe0373a70288f15df9726d1c3f14924319005d0 100644
--- a/chrome/test/mini_installer/registry_verifier.py
+++ b/chrome/test/mini_installer/registry_verifier.py
@@ -10,6 +10,11 @@ import verifier
 class RegistryVerifier(verifier.Verifier):
   """Verifies that the current registry matches the specified criteria."""
 
+  def __init__(self):
+    self._root_key_value = None
+    self._is_key_forbidden = None
+    self._sub_key = None
+
   def _RootKeyConstant(self, root_key):
     """Converts a root registry key string into a _winreg.HKEY_* constant."""
     root_key_mapping = {
@@ -63,21 +68,23 @@ class RegistryVerifier(verifier.Verifier):
       variable_expander: A VariableExpander object.
     """
     key = variable_expander.Expand(expectation_name)
-    root_key, sub_key = key.split('\\', 1)
+    root_key, self._sub_key = key.split('\\', 1)
+    self._root_key_value = self._RootKeyConstant(root_key)
+    self._is_key_forbidden = (expectation['exists'] == 'forbidden')
     try:
       # Query the Windows registry for the registry key. It will throw a
       # WindowsError if the key doesn't exist.
-      key_handle = _winreg.OpenKey(self._RootKeyConstant(root_key), sub_key, 0,
+      key_handle = _winreg.OpenKey(self._root_key_value, self._sub_key, 0,
                                    _winreg.KEY_QUERY_VALUE)
     except WindowsError:
       # Key doesn't exist. See that it matches the expectation.
-      assert expectation['exists'] != 'required', ('Registry key %s is '
-                                                   'missing' % key)
+      self._Assert(expectation['exists'] != 'required', ('Registry key %s is '
+                                                   'missing' % key))
       # Values are not checked if the missing key's existence is optional.
       return
     # The key exists, see that it matches the expectation.
-    assert expectation['exists'] != 'forbidden', ('Registry key %s exists' %
-                                                  key)
+    self._Assert(expectation['exists'] != 'forbidden',
+                 ('Registry key %s exists' % key))
 
     # Verify the expected values.
     if 'values' not in expectation: