goma: back to build-provided client and disable oauth2

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

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]\\gclient.py",
       "sync",
       "--verbose",
       "--force",
       "--revision",
@@ skipping 106 matching lines @@
       "@@@SET_BUILD_PROPERTY@got_angle_revision@\"fac9503c46405f77757b9a728eb85b8d7bc6080c\"@@@",
       "@@@SET_BUILD_PROPERTY@got_v8_revision@\"801ada225ddc271c132c3a35f03975671d43e399\"@@@",
       "@@@SET_BUILD_PROPERTY@got_v8_revision_cp@\"refs/heads/master@{#43426}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_swarming_client_revision_cp@\"refs/heads/master@{#276089}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_webrtc_revision_cp@\"refs/heads/master@{#120644}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_revision_cp@\"refs/heads/master@{#170242}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_angle_revision_cp@\"refs/heads/master@{#297276}\"@@@"
     ]
   },
   {
-    "cmd": [],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "ensure_goma"
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
-      "RECIPE_MODULE[build::cipd]\\resources\\bootstrap.py",
-      "--platform",
-      "windows-386",
-      "--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/windows-amd64 release",
-      "--json-output",
-      "/path/to/tmp/json",
-      "--service-account-json",
-      "C:\\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/windows-amd64\"@@@",
-      "@@@STEP_LOG_LINE@json.output@    }@@@",
-      "@@@STEP_LOG_LINE@json.output@  ]@@@",
-      "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@"
-    ]
-  },
-  {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]\\gclient.py",
       "runhooks"
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
-      "GYP_DEFINES": "chromium_win_pch=0 component=static_library fastbuild=1 gomadir='[CACHE]\\cipd\\goma' target_arch=ia32 use_goma=1",
+      "GYP_DEFINES": "chromium_win_pch=0 component=static_library fastbuild=1 gomadir='[BUILD]\\goma' target_arch=ia32 use_goma=1",
       "PATH": "%(PATH)s;RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient runhooks"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]\\src\\testing\\scripts\\get_compile_targets.py",
       "--output",
@@ skipping 60 matching lines @@
       "--goma-cache-dir",
       "[GOMA_CACHE]",
       "--build-tool",
       "ninja",
       "--build-data-dir",
       "[ROOT]\\build_data_dir",
       "--compiler",
       "goma",
       "--goma-jsonstatus",
       "/path/to/tmp/json",
-      "--goma-service-account-json-file",
-      "C:\\creds\\service_accounts\\service-account-goma-client.json",
       "--goma-dir",
-      "[CACHE]\\cipd\\goma",
+      "[BUILD]\\goma",
       "--goma-hermetic",
       "error",
       "--goma-enable-compiler-info-cache",
       "--",
       "base_unittests",
       "chromium_builder_tests",
       "content_unittests"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "compile",
@@ skipping 62 matching lines @@
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "process_dumps"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]