chromium_tests: use correct cwd for analyze diff

scripts/slave/recipe_modules/chromium_tests/api.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 collections
 import contextlib
 import copy
 import itertools
 import json
 
@@ skipping 659 matching lines @@
               'TESTS FAILED; retries without patch disabled (%s)'
                   % deapply_patch_reason)
 
   def get_files_affected_by_patch(self, relative_to='src/'):
     """Returns list of POSIX paths of files affected by patch for "analyze".
 
     Paths are relative to `relative_to` which for analyze should be 'src/'.
     """
     patch_root = self.m.gclient.calculate_patch_root(
         self.m.properties.get('patch_project'))
-    affected_files = self.m.tryserver.get_files_affected_by_patch(patch_root)
-    for i, path in enumerate(affected_files):
+    cwd = self._working_dir.join(patch_root) if self._working_dir else None
+    files = self.m.tryserver.get_files_affected_by_patch(patch_root, cwd=cwd)
+    for i, path in enumerate(files):
       path = str(path)
       assert path.startswith(relative_to)
-      affected_files[i] = path[len(relative_to):]
-    return affected_files
+      files[i] = path[len(relative_to):]
+    return files
 
   def analyze(self, affected_files, test_targets, additional_compile_targets,
               config_file_name, mb_mastername=None, mb_buildername=None,
               additional_names=None):
     """Runs "analyze" step to determine targets affected by the patch.
 
     Returns a tuple of:
       - list of targets that are needed to run tests (see filter recipe module)
       - list of targets that need to be compiled (see filter recipe module)"""
 
@@ skipping 142 matching lines @@
   def get_compile_targets_for_scripts(self):
     return self.m.python(
         name='get compile targets for scripts',
         script=self.m.path['checkout'].join(
             'testing', 'scripts', 'get_compile_targets.py'),
         args=[
             '--output', self.m.json.output(),
             '--',
         ] + self.get_common_args_for_scripts(),
         step_test_data=lambda: self.m.json.test_api.output({}))