[Android] Reland cleanup of old_interface in build/android/pylib.

build/android/pylib/host_driven/test_runner.py

Index: build/android/pylib/host_driven/test_runner.py
diff --git a/build/android/pylib/host_driven/test_runner.py b/build/android/pylib/host_driven/test_runner.py
index 865be20bfd2b565c84054ec240b8efcffdb6a06d..5e175bc587345e56d427bd2cc1ce9f04167599f0 100644
--- a/build/android/pylib/host_driven/test_runner.py
+++ b/build/android/pylib/host_driven/test_runner.py
@@ -47,23 +47,27 @@ class HostDrivenTestRunner(base_test_runner.BaseTestRunner):
   result, rather than being re-raised on the main thread.
   """
 
+  # TODO(jbudorick): Remove cleanup_test_files once it's no longer used.
+  # pylint: disable=unused-argument
   #override
-  def __init__(self, device, shard_index, tool, cleanup_test_files):
+  def __init__(self, device, shard_index, tool, cleanup_test_files=None):
     """Creates a new HostDrivenTestRunner.
 
     Args:
       device: Attached android device.
       shard_index: Shard index.
       tool: Name of the Valgrind tool.
-      cleanup_test_files: Whether or not to cleanup test files on device.
+      cleanup_test_files: Deprecated.
     """
 
-    super(HostDrivenTestRunner, self).__init__(device, tool, cleanup_test_files)
+    super(HostDrivenTestRunner, self).__init__(device, tool)
 
     # The shard index affords the ability to create unique port numbers (e.g.
     # DEFAULT_PORT + shard_index) if the test so wishes.
     self.shard_index = shard_index
 
+  # pylint: enable=unused-argument
+
   #override
   def RunTest(self, test):
     """Sets up and runs a test case.
@@ -82,7 +86,7 @@ class HostDrivenTestRunner(base_test_runner.BaseTestRunner):
     exception_raised = False
 
     try:
-      test.SetUp(str(self.device), self.shard_index, self._cleanup_test_files)
+      test.SetUp(str(self.device), self.shard_index)
     except Exception:
       logging.exception(
           'Caught exception while trying to run SetUp() for test: ' +