goma: back to build-provided client and disable oauth2

scripts/slave/recipes/chromium_trybot.expected/swarming_trigger_failure.json

Index: scripts/slave/recipes/chromium_trybot.expected/swarming_trigger_failure.json
diff --git a/scripts/slave/recipes/chromium_trybot.expected/swarming_trigger_failure.json b/scripts/slave/recipes/chromium_trybot.expected/swarming_trigger_failure.json
index cb38b822a62ebb73f589517a861e3696aff4c1a5..9d459178753e92935f300c85d51a7b8dd15339b9 100644
--- a/scripts/slave/recipes/chromium_trybot.expected/swarming_trigger_failure.json
+++ b/scripts/slave/recipes/chromium_trybot.expected/swarming_trigger_failure.json
@@ -103,63 +103,6 @@
     ]
   },
   {
-    "cmd": [],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "ensure_goma"
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
-      "RECIPE_MODULE[build::cipd]/resources/bootstrap.py",
-      "--platform",
-      "linux-amd64",
-      "--dest-directory",
-      "[SLAVE_BUILD]/cipd",
-      "--json-output",
-      "/path/to/tmp/json"
-    ],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "ensure_goma.install cipd",
-    "~followup_annotations": [
-      "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_TEXT@cipd instance_id: 40-chars-fake-of-the-package-instance_id@@@",
-      "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"executable\": \"[SLAVE_BUILD]/cipd/cipd\", @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"instance_id\": \"40-chars-fake-of-the-package-instance_id\"@@@",
-      "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "[SLAVE_BUILD]/cipd/cipd",
-      "ensure",
-      "--root",
-      "[CACHE]/cipd/goma",
-      "--list",
-      "infra_internal/goma/client/linux-amd64 release",
-      "--json-output",
-      "/path/to/tmp/json",
-      "--service-account-json",
-      "/creds/service_accounts/service-account-goma-client.json"
-    ],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "ensure_goma.ensure_installed",
-    "~followup_annotations": [
-      "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"result\": [@@@",
-      "@@@STEP_LOG_LINE@json.output@    {@@@",
-      "@@@STEP_LOG_LINE@json.output@      \"instance_id\": \"resolved-instance_id-of-release---------\", @@@",
-      "@@@STEP_LOG_LINE@json.output@      \"package\": \"infra_internal/goma/client/linux-amd64\"@@@",
-      "@@@STEP_LOG_LINE@json.output@    }@@@",
-      "@@@STEP_LOG_LINE@json.output@  ]@@@",
-      "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@"
-    ]
-  },
-  {
     "cmd": [
       "python",
       "-u",
@@ -183,7 +126,7 @@
     "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_CHROMIUM_NO_ACTION": "1",
-      "GYP_DEFINES": "archive_gpu_tests=1 component=static_library dcheck_always_on=1 fastbuild=1 ffmpeg_branding=Chrome gomadir='[CACHE]/cipd/goma' proprietary_codecs=1 target_arch=x64 test_isolation_mode=prepare use_goma=1",
+      "GYP_DEFINES": "archive_gpu_tests=1 component=static_library dcheck_always_on=1 fastbuild=1 ffmpeg_branding=Chrome gomadir='[BUILD]/goma' proprietary_codecs=1 target_arch=x64 test_isolation_mode=prepare use_goma=1",
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient runhooks (with patch)"
@@ -347,7 +290,7 @@
       "--config-file",
       "[SLAVE_BUILD]/src/tools/mb/mb_config.pyl",
       "--goma-dir",
-      "[CACHE]/cipd/goma",
+      "[BUILD]/goma",
       "//out/Release"
     ],
     "cwd": "[SLAVE_BUILD]",
@@ -377,10 +320,8 @@
       "goma",
       "--goma-jsonstatus",
       "/path/to/tmp/json",
-      "--goma-service-account-json-file",
-      "/creds/service_accounts/service-account-goma-client.json",
       "--goma-dir",
-      "[CACHE]/cipd/goma",
+      "[BUILD]/goma",
       "--goma-fail-fast",
       "--goma-disable-local-fallback",
       "--ninja-ensure-up-to-date",