goma: back to build-provided client and disable oauth2

scripts/slave/recipes/chromium.expected/full_chromium_Mac.json

Index: scripts/slave/recipes/chromium.expected/full_chromium_Mac.json
diff --git a/scripts/slave/recipes/chromium.expected/full_chromium_Mac.json b/scripts/slave/recipes/chromium.expected/full_chromium_Mac.json
index 3494c498934ff5279106ef19b79a16b473741734..ab5e6dce35dc4561d8b5946b5a0434d30fe1e798 100644
--- a/scripts/slave/recipes/chromium.expected/full_chromium_Mac.json
+++ b/scripts/slave/recipes/chromium.expected/full_chromium_Mac.json
@@ -98,63 +98,6 @@
     ]
   },
   {
-    "cmd": [],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "ensure_goma"
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
-      "RECIPE_MODULE[build::cipd]/resources/bootstrap.py",
-      "--platform",
-      "mac-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/mac-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/mac-amd64\"@@@",
-      "@@@STEP_LOG_LINE@json.output@    }@@@",
-      "@@@STEP_LOG_LINE@json.output@  ]@@@",
-      "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@"
-    ]
-  },
-  {
     "cmd": [
       "python",
       "-u",
@@ -163,7 +106,7 @@
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
-      "GYP_DEFINES": "clang=1 component=static_library gomadir='[CACHE]/cipd/goma' linux_dump_symbols=0 target_arch=x64 test_isolation_mode=noop use_goma=1",
+      "GYP_DEFINES": "clang=1 component=static_library gomadir='[BUILD]/goma' linux_dump_symbols=0 target_arch=x64 test_isolation_mode=noop use_goma=1",
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient runhooks"
@@ -264,10 +207,8 @@
       "goma-clang",
       "--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",
       "--ninja-ensure-up-to-date",
       "--clobber",
       "--",
@@ -288,7 +229,7 @@
       "--target",
       "Release",
       "--factory-properties",
-      "{\"gclient_env\": {\"GYP_DEFINES\": \"clang=1 component=static_library gomadir='[CACHE]/cipd/goma' linux_dump_symbols=0 target_arch=x64 test_isolation_mode=noop use_goma=1\"}, \"gs_acl\": \"public-read\", \"gs_bucket\": \"gs://chromium-browser-snapshots\"}",
+      "{\"gclient_env\": {\"GYP_DEFINES\": \"clang=1 component=static_library gomadir='[BUILD]/goma' linux_dump_symbols=0 target_arch=x64 test_isolation_mode=noop use_goma=1\"}, \"gs_acl\": \"public-read\", \"gs_bucket\": \"gs://chromium-browser-snapshots\"}",
       "--build-properties",
       "{\"got_angle_revision\": \"fac9503c46405f77757b9a728eb85b8d7bc6080c\", \"got_angle_revision_cp\": \"refs/heads/master@{#297276}\", \"got_nacl_revision\": \"d998e125e8253980d76e269b7982aeeefc1b9b50\", \"got_nacl_revision_cp\": \"refs/heads/master@{#274981}\", \"got_revision\": \"f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9\", \"got_revision_cp\": \"refs/heads/master@{#170242}\", \"got_swarming_client_revision\": \"a0ee5d99f1d4b38ddaa4c759c837980b63b99566\", \"got_swarming_client_revision_cp\": \"refs/heads/master@{#276089}\", \"got_v8_revision\": \"801ada225ddc271c132c3a35f03975671d43e399\", \"got_v8_revision_cp\": \"refs/heads/master@{#43426}\", \"got_webrtc_revision\": \"0f90628433546e61d9268596da93418c623137f4\", \"got_webrtc_revision_cp\": \"refs/heads/master@{#120644}\"}",
       "--mode",