Make step status EXCEPTION when test runner has infrastructure failure.

scripts/slave/recipe_modules/amp/example.py

 
 DEPS = [
   'amp',
   'json',
   'path',
   'properties',
 ]
 
 BUILDERS = {
   'normal_example': {
@@ skipping 83 matching lines @@
     'device_timeout': 60,
     'api_address': '127.0.0.1',
     'api_port': '80',
     'api_protocol': 'http',
   },
 }
 
 AMP_RESULTS_BUCKET = 'chrome-amp-results'
 
 def GenSteps(api):
+  api.amp.setup()
+
   builder = BUILDERS[api.properties['buildername']]
   api.path['checkout'] = api.path['slave_build'].join('src')
 
   api.amp.trigger_test_suite(
       'example_gtest_suite', 'gtest',
       api.amp.gtest_arguments('example_gtest_suite'),
       api.amp.amp_arguments(
           device_minimum_os=builder.get('device_minimum_os', None),
           device_name=builder.get('device_name', None),
           device_oem=builder.get('device_oem', None),
@@ skipping 50 matching lines @@
       api.test('bad_device_data_for_collect') +
       api.properties.generic(buildername='split_example') +
       api.override_step_data('[collect] load example_gtest_suite data',
                              api.json.output({})))
 
   yield (
     api.test('bad_test_id_data_for_upload') +
     api.properties.generic(buildername='split_example') +
     api.override_step_data('[upload logcat] load example_gtest_suite data',
                            api.json.output({})))