chromium_tests: apply chromium.get_env() when running tests

scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Win8_Debug__NVIDIA_.json

Index: scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Win8_Debug__NVIDIA_.json
diff --git a/scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Win8_Debug__NVIDIA_.json b/scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Win8_Debug__NVIDIA_.json
index 8f7cd4f455c616b65132b603156de07008c8ce41..eb28c83b7b9e7e5ab0870cce59106a1e98bec579 100644
--- a/scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Win8_Debug__NVIDIA_.json
+++ b/scripts/slave/recipes/chromium.expected/full_chromium_gpu_fyi_Win8_Debug__NVIDIA_.json
@@ -301,6 +301,9 @@
       "--output-json",
       "/path/to/tmp/json"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "find isolated tests",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -374,6 +377,9 @@
       "--",
       "--test-launcher-summary-output=${ISOLATED_OUTDIR}/output.json"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "[trigger] browser_tests on Windows-7-SP1",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -414,6 +420,9 @@
       "1",
       "browser_tests/Windows-7-SP1/ffffffffff/Win8 Debug (NVIDIA)/571"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "browser_tests on Windows-7-SP1",
     "~followup_annotations": [
       "@@@STEP_LINK@shard #0 isolated out@blah@@@"
@@ -439,6 +448,9 @@
       "--chrome-revision",
       "170242"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "Upload to test-results [browser_tests on Windows-7-SP1]"
   },
   {
@@ -449,6 +461,9 @@
       "--target",
       "Debug"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "process_dumps"
   },
   {