Reland of Include isolate.py in data for Android unit tests

PRESUBMIT_test_mocks.py

 # Copyright 2014 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 json
 import os
 import re
 import subprocess
 import sys
 
 
 class MockInputApi(object):
   """Mock class for the InputApi class.
 
   This class can be used for unittests for presubmit by initializing the files
   attribute as the list of changed files.
   """
 
   def __init__(self):
     self.json = json
     self.re = re
     self.os_path = os.path
     self.python_executable = sys.executable
     self.subprocess = subprocess
     self.files = []
     self.is_committing = False
     self.change = MockChange([])
 
-  def AffectedFiles(self, file_filter=None):
+  def AffectedFiles(self, file_filter=None, include_deletes=False):
     return self.files
 
   def AffectedSourceFiles(self, file_filter=None):
     return self.files
 
   def LocalPaths(self):
     return self.files
 
   def PresubmitLocalPath(self):
     return os.path.dirname(__file__)
@@ skipping 45 matching lines @@
       self.type = 'promptOrNotify'
 
 
 class MockFile(object):
   """Mock class for the File class.
 
   This class can be used to form the mock list of changed files in
   MockInputApi for presubmit unittests.
   """
 
-  def __init__(self, local_path, new_contents):
+  def __init__(self, local_path, new_contents, action='A'):
     self._local_path = local_path
     self._new_contents = new_contents
     self._changed_contents = [(i + 1, l) for i, l in enumerate(new_contents)]
+    self._action = action
 
   def Action(self):
-    return 'A'  # TODO(dbeam): feel free to change if your test actually uses.
+    return self._action
 
   def ChangedContents(self):
     return self._changed_contents
 
   def NewContents(self):
     return self._new_contents
 
   def LocalPath(self):
     return self._local_path
 
@@ skipping 19 matching lines @@
 
   This class can be used in presubmit unittests to mock the query of the
   current change.
   """
 
   def __init__(self, changed_files):
     self._changed_files = changed_files
 
   def LocalPaths(self):
     return self._changed_files