Add a snapshot of flutter/engine/src/build to our sdk

build/android/pylib/base/base_setup.py

Index: build/android/pylib/base/base_setup.py
diff --git a/build/android/pylib/base/base_setup.py b/build/android/pylib/base/base_setup.py
new file mode 100644
index 0000000000000000000000000000000000000000..a416380a949a28b97f6463a0a5315824c57a88b5
--- /dev/null
+++ b/build/android/pylib/base/base_setup.py
@@ -0,0 +1,63 @@
+# Copyright (c) 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.
+
+"""Base script for doing test setup."""
+
+import logging
+import os
+
+from pylib import constants
+from pylib import valgrind_tools
+from pylib.utils import isolator
+
+def GenerateDepsDirUsingIsolate(suite_name, isolate_file_path,
+                                isolate_file_paths, deps_exclusion_list):
+  """Generate the dependency dir for the test suite using isolate.
+
+  Args:
+    suite_name: Name of the test suite (e.g. base_unittests).
+    isolate_file_path: .isolate file path to use. If there is a default .isolate
+                       file path for the suite_name, this will override it.
+    isolate_file_paths: Dictionary with the default .isolate file paths for
+                        the test suites.
+    deps_exclusion_list: A list of files that are listed as dependencies in the
+                         .isolate files but should not be pushed to the device.
+  Returns:
+    The Isolator instance used to remap the dependencies, or None.
+  """
+  if isolate_file_path:
+    if os.path.isabs(isolate_file_path):
+      isolate_abs_path = isolate_file_path
+    else:
+      isolate_abs_path = os.path.join(constants.DIR_SOURCE_ROOT,
+                                      isolate_file_path)
+  else:
+    isolate_rel_path = isolate_file_paths.get(suite_name)
+    if not isolate_rel_path:
+      logging.info('Did not find an isolate file for the test suite.')
+      return
+    isolate_abs_path = os.path.join(constants.DIR_SOURCE_ROOT, isolate_rel_path)
+
+  isolated_abs_path = os.path.join(
+      constants.GetOutDirectory(), '%s.isolated' % suite_name)
+  assert os.path.exists(isolate_abs_path), 'Cannot find %s' % isolate_abs_path
+
+  i = isolator.Isolator(constants.ISOLATE_DEPS_DIR)
+  i.Clear()
+  i.Remap(isolate_abs_path, isolated_abs_path)
+  # We're relying on the fact that timestamps are preserved
+  # by the remap command (hardlinked). Otherwise, all the data
+  # will be pushed to the device once we move to using time diff
+  # instead of md5sum. Perform a sanity check here.
+  i.VerifyHardlinks()
+  i.PurgeExcluded(deps_exclusion_list)
+  i.MoveOutputDeps()
+  return i
+
+
+def PushDataDeps(device, device_dir, test_options):
+  valgrind_tools.PushFilesForTool(test_options.tool, device)
+  if os.path.exists(constants.ISOLATE_DEPS_DIR):
+    device.PushChangedFiles([(constants.ISOLATE_DEPS_DIR, device_dir)],
+                            delete_device_stale=test_options.delete_stale_data)