Cause chromium_android recipe to consume device_status_check's json.

scripts/slave/recipes/cronet.expected/android_cronet_armv6_builder.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, sys\n\nbuild_path = sys.argv[1]\nif os.path.exists(build_path):\n  for (path, dir, files) in os.walk(build_path):\n    for cur_file in files:\n      if cur_file.endswith('index.lock'):\n        path_to_file = os.path.join(path, cur_file)\n        print 'deleting %s' % path_to_file\n        os.remove(path_to_file)\n",
       "[SLAVE_BUILD]"
     ],
     "name": "cleanup index.lock",
     "~followup_annotations": [
@@ skipping 208 matching lines @@
       "[SLAVE_BUILD]/src/build/android/adb_logcat_monitor.py",
       "[SLAVE_BUILD]/src/out/logcat"
     ],
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
     "name": "spawn_logcat_monitor"
   },
   {
     "cmd": [
-      "[SLAVE_BUILD]/src/build/android/buildbot/bb_device_status_check.py"
+      "[SLAVE_BUILD]/src/build/android/buildbot/bb_device_status_check.py",
+      "--json-output",
+      "/path/to/tmp/json"
     ],
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
-    "name": "device_status_check"
+    "name": "device_status_check",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@[@@@",
+      "@@@STEP_LOG_LINE@json.output@  {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"battery\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"AC powered\": \"false\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"USB powered\": \"true\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"Wireless powered\": \"false\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"health\": \"2\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"level\": \"100\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"present\": \"true\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"scale\": \"100\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"status\": \"5\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"technology\": \"Li-ion\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"temperature\": \"249\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"voltage\": \"4286\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"build\": \"LRX21O\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"build_detail\": \"google/razor/flo:5.0/LRX21O/1570415:userdebug/dev-keys\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"imei_slice\": \"Unknown\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"serial\": \"07a00ca4\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"type\": \"flo\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"wifi_ip\": \"\"@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@]@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]/src/build/android/provision_devices.py",
       "-t",
       "Release"
     ],
     "env": {
@@ skipping 97 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@import glob, os, sys@@@",
       "@@@STEP_LOG_LINE@python.inline@for report in glob.glob(sys.argv[1]):@@@",
       "@@@STEP_LOG_LINE@python.inline@  with open(report, 'r') as f:@@@",
       "@@@STEP_LOG_LINE@python.inline@    for l in f.readlines():@@@",
       "@@@STEP_LOG_LINE@python.inline@      print l@@@",
       "@@@STEP_LOG_LINE@python.inline@  os.remove(report)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   }
 ]