The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/tools/build.git/+/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49

commit 92ccc8ab5cedd76fdbd76697f9b96a5432a50d49
Author: Chan Li <chanli@chromium.org>
Date: Sun Dec 18 13:20:44 2016

Add step_metadata to each step.

1. Stored wf_mastermane and wf_buildername for steps, but not all of
them: only tests that are generated by generators have these values.
2. For SwarmingTest, collect metadata like:
	a. canonical step name
        b. full step name
        c. dimentions
        d. is the test patched or not
        e. all swarming task ids related to the step
3.Currently only SwarmingTest will have the correcponding log displayed.

BUG= 648743 ,  658935 

Change-Id: I6e9bce49f049b03ca5edd430c4c998aaf2e58a3b
Reviewed-on: https://chromium-review.googlesource.com/418071
Commit-Queue: Chan Li <chanli@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>

[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipe_modules/chromium_tests/steps.py
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipe_modules/swarming/api.py
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/dynamic_swarmed_failed_isolated_script_test.json
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[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/dynamic_swarmed_passed_isolated_script_test.json
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[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/dynamic_swarmed_passed_with_bad_retcode_isolated_script_test.json
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[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_fyi_Linux_remote_run_Tester.json
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[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_7_Perf.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_7_x64_Perf.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_8_Perf.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_Zenbook_Perf.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_perf_fyi_Win_10_4_Core_Low_End_Perf_Tests.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_perf_fyi_Win_10_Low_End_Perf_Tests.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Mac10_10.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Mac10_11.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Mac10_11__dbg_.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Mac10_11__retina_.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Mac10_9.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win10.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win7.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win7__dbg_.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_win_Win10_Tests_x64.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_win_Win7_Tests__1_.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_win_Win7_Tests__dbg__1_.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_win_Win7__32__Tests.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_chromium_win_Win_7_Tests_x64__1_.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_client_skia_Linux_Tests.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_client_skia_Linux_Tests_Trybot.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_client_skia_Mac10_9_Tests.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_client_skia_Mac10_9_Tests_Trybot.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_client_skia_Win7_Tests__1_.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium.expected/full_client_skia_Win7_Tests__1__Trybot.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium_trybot.expected/dynamic_isolated_script_test_with_args_on_trybot.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium_trybot.expected/swarming_test_failure.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/chromium_trybot.expected/swarming_test_with_priority_expiration_and_timeout.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/all_test_failed.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/all_test_passed.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/findit_consecutive_culprits.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/findit_culprit_in_first_sub_range.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/findit_culprit_in_last_sub_range.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/findit_culprit_in_middle_sub_range.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/findit_steps_multiple_culprits.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/findit_tests_multiple_culprits.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/only_one_test_passed.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/swarming_tests.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/unaffected_test_skipped_by_analyze.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/use_analyze_set_to_False_for_non_linear_try_job.json
[modify] https://crrev.com/92ccc8ab5cedd76fdbd76697f9b96a5432a50d49/scripts/slave/recipes/findit/chromium/test.expected/use_build_parameter_for_tests.json
[modify

One sample is as below:

{
  "canonical_step_name": "unit_tests", 
  "dimensions": {
    "android_devices": "4", 
    "device_os": "MMB29Q", 
    "device_type": "bullhead", 
    "os": "Android", 
    "pool": "Chrome"
  }, 
  "full_step_name": "unit_tests on Android", 
  "patched": false, 
  "swarm_task_ids": [
    "3332854b76f01510"
  ], 
  "waterfall_buildername": "Android N5X Swarm Builder", 
  "waterfall_mastername": "chromium.android"
}