chromium_tests: apply chromium.get_env() when running tests

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

Index: scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Mac_Retina_Debug.json
diff --git a/scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Mac_Retina_Debug.json b/scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Mac_Retina_Debug.json
index 1128c6bebbb58ee6c4b54efa8d0fca5a5e93201f..6eb35f879d94b25f1ad7c5a24d0833b1753bbe4d 100644
--- a/scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Mac_Retina_Debug.json
+++ b/scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Mac_Retina_Debug.json
@@ -293,6 +293,9 @@
       "--output-json",
       "/path/to/tmp/json"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
+    },
     "name": "find isolated tests",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -366,6 +369,9 @@
       "--",
       "--test-launcher-summary-output=${ISOLATED_OUTDIR}/output.json"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
+    },
     "name": "[trigger] browser_tests on Mac-10.9",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -406,6 +412,9 @@
       "1",
       "browser_tests/Mac-10.9/ffffffffff/Mac Retina Debug/571"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
+    },
     "name": "browser_tests on Mac-10.9",
     "~followup_annotations": [
       "@@@STEP_LINK@shard #0 isolated out@blah@@@"
@@ -431,6 +440,9 @@
       "--chrome-revision",
       "170242"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
+    },
     "name": "Upload to test-results [browser_tests on Mac-10.9]"
   },
   {