Manual partial update from from https://crrev.com/337502

build/android/pylib/gtest/test_package.py

 # Copyright (c) 2012 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.
 
 """Base class representing GTest test packages."""
 # pylint: disable=R0201
 
 
 class TestPackage(object):
 
   """A helper base class for both APK and stand-alone executables.
 
   Args:
     suite_name: Name of the test suite (e.g. base_unittests).
   """
   def __init__(self, suite_name):
     self.suite_name = suite_name
 
   def ClearApplicationState(self, device):
     """Clears the application state.
 
     Args:
       device: Instance of DeviceUtils.
     """
-    raise NotImplementedError('Method must be overriden.')
+    raise NotImplementedError('Method must be overridden.')
 
   def CreateCommandLineFileOnDevice(self, device, test_filter, test_arguments):
     """Creates a test runner script and pushes to the device.
 
     Args:
       device: Instance of DeviceUtils.
       test_filter: A test_filter flag.
       test_arguments: Additional arguments to pass to the test binary.
     """
-    raise NotImplementedError('Method must be overriden.')
+    raise NotImplementedError('Method must be overridden.')
 
   def GetAllTests(self, device):
     """Returns a list of all tests available in the test suite.
 
     Args:
       device: Instance of DeviceUtils.
     """
-    raise NotImplementedError('Method must be overriden.')
+    raise NotImplementedError('Method must be overridden.')
 
   def GetGTestReturnCode(self, _device):
     return None
 
   def SpawnTestProcess(self, device):
     """Spawn the test process.
 
     Args:
       device: Instance of DeviceUtils.
 
     Returns:
       An instance of pexpect spawn class.
     """
-    raise NotImplementedError('Method must be overriden.')
+    raise NotImplementedError('Method must be overridden.')
 
   def Install(self, device):
     """Install the test package to the device.
 
     Args:
       device: Instance of DeviceUtils.
     """
-    raise NotImplementedError('Method must be overriden.')
+    raise NotImplementedError('Method must be overridden.')
 
+  def PullAppFiles(self, device, files, directory):
+    """Pull application data from the device.
+
+    Args:
+      device: Instance of DeviceUtils.
+      files: A list of paths relative to the application data directory to
+        retrieve from the device.
+      directory: The host directory to which files should be pulled.
+    """
+    raise NotImplementedError('Method must be overridden.')