chromium_tests: apply chromium.get_env() when running tests

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

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]\\scripts\\slave\\kill_processes.py"
     ],
     "name": "taskkill"
   },
   {
@@ skipping 225 matching lines @@
       "-u",
       "[SLAVE_BUILD]\\src\\tools\\perf\\run_benchmark",
       "list",
       "--browser",
       "release",
       "--json-output",
       "/path/to/tmp/json",
       "--num-shards",
       "1"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "List Perf Tests",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"steps\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"blink_perf.all.exact\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"cmd\": \"/usr/bin/python /path/to/run_benchmark --a=1 -v --b=2\", @@@",
       "@@@STEP_LOG_LINE@json.output@      \"device_affinity\": 0, @@@",
       "@@@STEP_LOG_LINE@json.output@      \"perf_dashboard_id\": \"blink_perf.all\"@@@",
       "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"blink_perf.all.release\": {@@@",
@@ skipping 43 matching lines @@
       "/path/to/tmp/json",
       "--builder-name=Win Clang Perf",
       "--slave-name=TestSlavename",
       "--build-number=571",
       "--run-python-script",
       "/path/to/run_benchmark",
       "--a=1",
       "-v",
       "--b=2"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "blink_perf.all.exact",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@[]@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "allow_subannotations": true,
     "cmd": [
       "python",
@@ skipping 15 matching lines @@
       "/path/to/tmp/json",
       "--builder-name=Win Clang Perf",
       "--slave-name=TestSlavename",
       "--build-number=571",
       "--run-python-script",
       "/path/to/run_benchmark",
       "--a=1",
       "-v",
       "--b=2"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "blink_perf.all.release",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@[]@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "allow_subannotations": true,
     "cmd": [
       "python",
@@ skipping 14 matching lines @@
       "--chartjson-file",
       "/path/to/tmp/json",
       "--builder-name=Win Clang Perf",
       "--slave-name=TestSlavename",
       "--build-number=571",
       "--run-python-script",
       "-v",
       "--upload-results",
       "blink_perf.dom"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "blink_perf.dom",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@[]@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "allow_subannotations": true,
     "cmd": [
       "python",
@@ skipping 12 matching lines @@
       "--test-type=dromaeo.cssqueryjquery",
       "--step-name=dromaeo.cssqueryjquery",
       "--chartjson-file",
       "/path/to/tmp/json",
       "--builder-name=Win Clang Perf",
       "--slave-name=TestSlavename",
       "--build-number=571",
       "--run-python-script",
       "/path/to/run_benchmark"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "dromaeo.cssqueryjquery",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@[]@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "allow_subannotations": true,
     "cmd": [
       "python",
@@ skipping 12 matching lines @@
       "--test-type=dromaeo.cssqueryjquery",
       "--step-name=dromaeo.cssqueryjquery.release",
       "--chartjson-file",
       "/path/to/tmp/json",
       "--builder-name=Win Clang Perf",
       "--slave-name=TestSlavename",
       "--build-number=571",
       "--run-python-script",
       "/path/to/run_benchmark"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "dromaeo.cssqueryjquery.release",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@[]@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]\\scripts\\slave\\process_dumps.py",
       "--target",
       "Release"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "process_dumps"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]