Refactor stages 1, 2 and test_api overhaul.

scripts/slave/recipes/bisect.expected/broken_good_revision_test.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "tryserver.chromium.perf",
       "--builder",
       "linux_perf_bisect",
@@ skipping 634 matching lines @@
       "00316c9ddfb9d7b4e1ed2fff9fe6d964d2111111"
     ],
     "cwd": "[SLAVE_BUILD]/src",
     "name": "resolving hash 00316c9ddfb9d7b4e1ed2fff9fe6d964d2111111",
     "stdout": "/path/to/tmp/"
   },
   {
     "cmd": [],
     "name": "Debug Info",
     "~followup_annotations": [
-      "@@@STEP_LOG_LINE@Debug Info@bisector.lkgr: RevisionState(rev=chromium@e28dc0d49c, values=[], mean_value=None, std_dev=None)@@@",
-      "@@@STEP_LOG_LINE@Debug Info@bisector.fkbr: RevisionState(rev=chromium@a6298e4afe, values=[19, 20, 21], mean_value=20.0, std_dev=1.0)@@@",
+      "@@@STEP_LOG_LINE@Debug Info@bisector.lkgr: RevisionState(rev=chromium@e28dc0d49c), values=[]@@@",
+      "@@@STEP_LOG_LINE@Debug Info@bisector.fkbr: RevisionState(rev=chromium@a6298e4afe, values=(19, 20, 21), mean_value=20.0, std_dev=1.0)@@@",
       "@@@STEP_LOG_LINE@Debug Info@@@@",
       "@@@STEP_LOG_LINE@Debug Info@Revision       Values         @@@",
-      "@@@STEP_LOG_LINE@Debug Info@chromium@e28dc0d49c[]             @@@",
-      "@@@STEP_LOG_LINE@Debug Info@chromium@fc6dfc7ff5[]             @@@",
-      "@@@STEP_LOG_LINE@Debug Info@chromium@00316c9ddf[]             @@@",
-      "@@@STEP_LOG_LINE@Debug Info@chromium@a6298e4afe[19, 20, 21]   @@@",
+      "@@@STEP_LOG_LINE@Debug Info@chromium@e28dc0d49c()             @@@",
+      "@@@STEP_LOG_LINE@Debug Info@chromium@fc6dfc7ff5()             @@@",
+      "@@@STEP_LOG_LINE@Debug Info@chromium@00316c9ddf()             @@@",
+      "@@@STEP_LOG_LINE@Debug Info@chromium@a6298e4afe(19, 20, 21)   @@@",
       "@@@STEP_LOG_END@Debug Info@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::perf_dashboard]/resources/post_json.py"
     ],
     "name": "Post bisect results",
     "stdin": "{\"data\": {\"aborted_reason\": null, \"bad_revision\": \"a6298e4afedbf2cd461755ea6f45b0ad64222222\", \"bisect_bot\": \"linux_perf_tester\", \"bug_id\": \"425582\", \"buildbot_log_url\": \"http://c.org/p/cr/builders/linux_perf_bisect/builds/571\", \"change\": null, \"command\": \"tools/perf/run_benchmark -v --browser=release page_cycler.intl_ar_fa_he\", \"culprit_data\": null, \"good_revision\": \"e28dc0d49c331def2a3bbf3ddd0096eb51551155\", \"metric\": \"warm_times/page_load_time\", \"revision_data\": [{\"commit_hash\": \"a6298e4afedbf2cd461755ea6f45b0ad64222222\", \"depot_name\": \"chromium\", \"mean_value\": 20.0, \"result\": \"bad\", \"revision_string\": \"chromium@a6298e4afe\", \"std_dev\": 1.0, \"values\": [19, 20, 21]}], \"score\": 0, \"status\": \"failed\", \"test_type\": \"perf\", \"try_job_id\": null, \"warnings\": []}, \"url\": \"https://chromeperf.appspot.com/post_bisect_results\"}",
     "stdout": "/path/to/tmp/json",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"status_code\": 200@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]