chromium_tests: apply chromium.get_env() when running tests

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

Index: scripts/slave/recipes/chromium_trybot.expected/full_tryserver_blink_mac_blink_rel_fail.json
diff --git a/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_blink_mac_blink_rel_fail.json b/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_blink_mac_blink_rel_fail.json
index d1af9ea3811a958db43be4acbf1c4ac0b40e61ec..dd02c412ba37a3a95c4eff0a3db225560b35bbfd 100644
--- a/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_blink_mac_blink_rel_fail.json
+++ b/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_blink_mac_blink_rel_fail.json
@@ -438,6 +438,9 @@
       "--step-name",
       "webkit_tests (with patch)"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
+    },
     "name": "webkit_tests (with patch)",
     "~followup_annotations": [
       "step returned non-zero exit code: 5",
@@ -461,6 +464,9 @@
       "--gs-bucket",
       "gs://chromium-layout-test-archives"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
+    },
     "name": "archive_webkit_tests_results",
     "~followup_annotations": [
       "@@@STEP_LINK@layout_test_results@https://storage.googleapis.com/chromium-layout-test-archives/mac_blink_rel/571/layout-test-results/results.html@@@",
@@ -498,6 +504,7 @@
       "--output_manifest"
     ],
     "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json",
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "bot_update (without patch)",
@@ -702,6 +709,9 @@
       "--skipped",
       "always"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
+    },
     "name": "webkit_tests (without patch)",
     "~followup_annotations": [
       "step returned non-zero exit code: 5",
@@ -715,6 +725,9 @@
       "-u",
       "import sys; sys.exit(0)"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
+    },
     "name": "webkit_tests (retry summary)",
     "~followup_annotations": [
       "@@@STEP_TEXT@<br/>ignored:<br/>bad/totally-bad-probably.html<br/>tricky/totally-maybe-not-awesome.html<br/>@@@",