Reland "Support xctests"

scripts/slave/recipe_modules/ios/api.py

Index: scripts/slave/recipe_modules/ios/api.py
diff --git a/scripts/slave/recipe_modules/ios/api.py b/scripts/slave/recipe_modules/ios/api.py
index bad516a79f92afd2948788405187d7fdd018f11b..50251bcb85cd98edbfd3f13593b24f4360e65e80 100644
--- a/scripts/slave/recipe_modules/ios/api.py
+++ b/scripts/slave/recipe_modules/ios/api.py
@@ -481,6 +481,7 @@ class iOSApi(recipe_api.RecipeApi):
     cmd = [
       'src/ios/build/bots/scripts/run.py',
       '--app', '<(app_path)',
+      '--args-json', '{"xctest": <(xctest)}',
       '--out-dir', '${ISOLATED_OUTDIR}',
       '--xcode-version', '<(xcode_version)',
     ]
@@ -544,6 +545,8 @@ class iOSApi(recipe_api.RecipeApi):
           '--config-variable', 'app_path', app_path,
           '--config-variable', 'xcode_version', test.get(
             'xcode version', self.__config['xcode version']),
+          '--config-variable', 'xctest', (
+            'true' if test.get('xctest') else 'false'),
           '--isolate', isolate_template,
           '--isolated', tmp_dir.join('%s.isolated' % test['id']),
           '--path-variable', 'app_path', app_path,