Make all the rest of the recipes explicitly specify GIT_MODE

scripts/slave/recipes/libyuv/libyuv.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.
 
 """
 Recipe for building and running tests for Libyuv stand-alone.
 """
 
 from recipe_engine.types import freeze
 
@@ skipping 843 matching lines @@
   bot_config = master_dict.get('builders', {}).get(buildername)
   assert bot_config, ('Unrecognized builder name "%r" for master "%r".' %
                       (buildername, mastername))
   recipe_config_name = bot_config['recipe_config']
   recipe_config = RECIPE_CONFIGS.get(recipe_config_name)
   assert recipe_config, ('Cannot find recipe_config "%s" for builder "%r".' %
                          (recipe_config_name, buildername))
 
   api.chromium.set_config(recipe_config['chromium_config'],
                           **bot_config.get('chromium_config_kwargs', {}))
-  api.gclient.set_config(recipe_config['gclient_config'])
+  api.gclient.set_config(recipe_config['gclient_config'], GIT_MODE=True)
   for c in bot_config.get('gclient_apply_config', []):
     api.gclient.apply_config(c)
   for c in bot_config.get('chromium_apply_config', []):
     api.chromium.apply_config(c)
 
   if api.tryserver.is_tryserver:
     api.chromium.apply_config('trybot_flavor')
 
   api.bot_update.ensure_checkout(force=True)
   api.chromium.ensure_goma()
@@ skipping 42 matching lines @@
 
   # Forced builds (not specifying any revision) and test failures.
   mastername = 'client.libyuv'
   yield generate_builder(mastername, 'Linux64 Debug', revision=None,
                          suffix='_forced')
   yield generate_builder(mastername, 'Android Debug', revision=None,
                          suffix='_forced')
 
   yield generate_builder('tryserver.libyuv', 'linux', revision=None,
                          suffix='_forced')