Added GLib/DBus workaround to runtest.py under --do-dbus-workaround option.

scripts/slave/recipe_modules/gpu/api.py

 # Copyright 2013 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.
 
 from slave import recipe_api
 
 class GpuApi(recipe_api.RecipeApi):
   def run_telemetry_gpu_test(self, test, name='', args=None,
                              results_directory=''):
     return self.m.chromium.run_telemetry_test(
         str(self.m.path.checkout('content', 'test', 'gpu', 'run_gpu_test')),
-        test, name, args, results_directory)
+        test, name, args, results_directory, spawn_dbus=True)
 
   def archive_pixel_test_results(self, name, run_id, generated_dir,
                                  reference_dir, gsutil=''):
     if not gsutil:
       gsutil = self.m.path.build('scripts', 'slave', 'gsutil',
                                  platform_ext={'win': '.bat'})
 
     args = ['--run-id',
             run_id,
             '--generated-dir', generated_dir,
             '--gpu-reference-dir', reference_dir,
             '--gsutil', gsutil]
     return self.m.python(name,
                          self.m.path.build('scripts', 'slave', 'chromium',
                                            'archive_gpu_pixel_test_results.py'),
                          args, always_run=True)