[Chromecast] Use ScopedTemp[File|Dir] in tests.

chromecast/chromecast.gyp

 # 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.
 
 {
   'variables': {
     'android_support_v13_target%':
         '../third_party/android_tools/android_tools.gyp:android_support_v13_javalib',
     'cast_build_release': 'internal/build/cast_build_release',
     'cast_is_debug_build%': 0,
@@ skipping 93 matching lines @@
         'base/metrics/cast_metrics_helper.cc',
         'base/metrics/cast_metrics_helper.h',
         'base/metrics/grouped_histogram.cc',
         'base/metrics/grouped_histogram.h',
         'base/path_utils.cc',
         'base/path_utils.h',
         'base/pref_names.cc',
         'base/pref_names.h',
         'base/process_utils.cc',
         'base/process_utils.h',
+        'base/scoped_temp_file.cc',
+        'base/scoped_temp_file.h',
         'base/serializers.cc',
         'base/serializers.h',
         'base/system_time_change_notifier.cc',
         'base/system_time_change_notifier.h',
         'base/task_runner_impl.cc',
         'base/task_runner_impl.h',
       ],
       'conditions': [
         ['OS=="android"', {
           'dependencies': [
@@ skipping 653 matching lines @@
             'cast_shell_core',
           ],
           'sources': [
             'app/cast_main.cc',
           ],
         },
       ],  # end of targets
     }],
   ],  # end of conditions
 }