Use buildbucket to assess build failure.

scripts/slave/recipe_modules/auto_bisect/example.expected/windows_x64_bisector.json

 [
   {
     "cmd": [
       "git",
       "update-ref",
       "refs/heads/master",
       "refs/remotes/origin/master"
     ],
     "cwd": "[TMP_BASE]/fake_checkout_tmp_1",
     "name": "git update-ref"
@@ skipping 164 matching lines @@
       "put",
       "--host",
       "cr-buildbucket.appspot.com",
       "--service-account-json",
       "/creds/service_accounts/service-account-chromium-bisect.json",
       "{\"bucket\": \"master.tryserver.chromium.perf\", \"client_operation_id\": \"dummy\", \"parameters_json\": \"{\\\"builder_name\\\": \\\"winx64_bisect_builder\\\", \\\"properties\\\": {\\\"build_archive_url\\\": \\\"gs://chrome-perf/Win x64 Builder/full-build-win32_a6298e4afedbf2cd461755ea6f45b0ad64222222.zip\\\", \\\"clobber\\\": true, \\\"parent_got_revision\\\": \\\"a6298e4afedbf2cd461755ea6f45b0ad64222222\\\"}}\", \"tags\": [\"builder:winx64_bisect_builder\", \"master:tryserver.chromium.perf\", \"user_agent:recipe\"]}"
     ],
     "name": "buildbucket.put",
     "stdout": "/path/to/tmp/json",
     "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output (invalid)@null@@@",
-      "@@@STEP_LOG_END@json.output (invalid)@@@"
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"results\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"build\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"id\": \"1201331270\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
       "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "ls",
       "gs://chrome-perf/Win x64 Builder/full-build-win32_00316c9ddfb9d7b4e1ed2fff9fe6d964d2111111.zip"
     ],
     "name": "gsutil ls (2)"
   },
   {
     "cmd": [
       "/opt/infra-tools/buildbucket",
       "put",
       "--host",
       "cr-buildbucket.appspot.com",
       "--service-account-json",
       "/creds/service_accounts/service-account-chromium-bisect.json",
       "{\"bucket\": \"master.tryserver.chromium.perf\", \"client_operation_id\": \"dummy\", \"parameters_json\": \"{\\\"builder_name\\\": \\\"winx64_bisect_builder\\\", \\\"properties\\\": {\\\"build_archive_url\\\": \\\"gs://chrome-perf/Win x64 Builder/full-build-win32_00316c9ddfb9d7b4e1ed2fff9fe6d964d2111111.zip\\\", \\\"clobber\\\": true, \\\"parent_got_revision\\\": \\\"00316c9ddfb9d7b4e1ed2fff9fe6d964d2111111\\\"}}\", \"tags\": [\"builder:winx64_bisect_builder\", \"master:tryserver.chromium.perf\", \"user_agent:recipe\"]}"
     ],
     "name": "buildbucket.put (2)",
     "stdout": "/path/to/tmp/json",
     "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output (invalid)@null@@@",
-      "@@@STEP_LOG_END@json.output (invalid)@@@"
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"results\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"build\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"id\": \"1201331270\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
       "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
@@ skipping 168 matching lines @@
       "put",
       "--host",
       "cr-buildbucket.appspot.com",
       "--service-account-json",
       "/creds/service_accounts/service-account-chromium-bisect.json",
       "{\"bucket\": \"master.tryserver.chromium.perf\", \"client_operation_id\": \"dummy\", \"parameters_json\": \"{\\\"builder_name\\\": \\\"winx64_bisect_builder\\\", \\\"properties\\\": {\\\"build_archive_url\\\": \\\"gs://chrome-perf/Win x64 Builder/full-build-win32_dcdcdc0ff1122212323134879ddceeb1240b0988.zip\\\", \\\"clobber\\\": true, \\\"parent_got_revision\\\": \\\"dcdcdc0ff1122212323134879ddceeb1240b0988\\\"}}\", \"tags\": [\"builder:winx64_bisect_builder\", \"master:tryserver.chromium.perf\", \"user_agent:recipe\"]}"
     ],
     "name": "buildbucket.put (3)",
     "stdout": "/path/to/tmp/json",
     "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output (invalid)@null@@@",
-      "@@@STEP_LOG_END@json.output (invalid)@@@"
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"results\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"build\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"id\": \"1201331270\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
       "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
@@ skipping 250 matching lines @@
       "put",
       "--host",
       "cr-buildbucket.appspot.com",
       "--service-account-json",
       "/creds/service_accounts/service-account-chromium-bisect.json",
       "{\"bucket\": \"master.tryserver.chromium.perf\", \"client_operation_id\": \"dummy\", \"parameters_json\": \"{\\\"builder_name\\\": \\\"winx64_bisect_builder\\\", \\\"properties\\\": {\\\"build_archive_url\\\": \\\"gs://chrome-perf/Win x64 Builder/full-build-win32_a6298e4afedbf2cd461755ea6f45b0ad64222222_51e7ed4b63ad81d8b499e42b888149349afaaca1.zip\\\", \\\"clobber\\\": true, \\\"deps_revision_overrides\\\": {\\\"src/v8\\\": \\\"003\\\"}, \\\"parent_got_revision\\\": \\\"a6298e4afedbf2cd461755ea6f45b0ad64222222\\\"}}\", \"tags\": [\"builder:winx64_bisect_builder\", \"master:tryserver.chromium.perf\", \"user_agent:recipe\"]}"
     ],
     "name": "buildbucket.put (4)",
     "stdout": "/path/to/tmp/json",
     "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output (invalid)@null@@@",
-      "@@@STEP_LOG_END@json.output (invalid)@@@"
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"results\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"build\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"id\": \"1201331270\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::auto_bisect]/resources/fetch_revision_info.py",
       "003",
       "v8"
     ],
@@ skipping 278 matching lines @@
       "{\"bisect_config\": {\"bad_revision\": \"314017\", \"bug_id\": \"-1\", \"builder_host\": \"master4.golo.chromium.org\", \"builder_port\": \"8341\", \"bypass_stats_check\": \"True\", \"command\": \"src/tools/perf/run_benchmark -v --browser=release_x64 smoothness.tough_scrolling_cases\", \"dummy_builds\": \"True\", \"dummy_job_names\": \"True\", \"dummy_tests\": \"True\", \"good_revision\": \"314015\", \"gs_bucket\": \"chrome-perf\", \"max_time_minutes\": \"5\", \"metric\": \"mean_input_event_latency/mean_input_event_latency\", \"recipe_tester_name\": \"chromium_rel_win7_x64\", \"repeat_count\": \"2\", \"skip_gclient_ops\": \"True\", \"test_type\": \"perf\"}, \"buildername\": \"linux_perf_bisect\", \"mastername\": \"tryserver.chromium.perf\", \"recipe\": \"auto_bisect:example\", \"slavename\": \"dummyslave\"}"
     ],
     "name": "Running Bisection"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]