chromium_tests: apply chromium.get_env() when running tests

scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_7_ATI_GPU_Perf__2_.json

Index: scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_7_ATI_GPU_Perf__2_.json
diff --git a/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_7_ATI_GPU_Perf__2_.json b/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_7_ATI_GPU_Perf__2_.json
index 8650c81ad22a870e7be6c99e8177e290b78c06b5..cbe7503cae6963de952dbe897b1c295d1221d68b 100644
--- a/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_7_ATI_GPU_Perf__2_.json
+++ b/scripts/slave/recipes/chromium.expected/full_chromium_perf_Win_7_ATI_GPU_Perf__2_.json
@@ -279,6 +279,9 @@
       "--num-shards",
       "5"
     ],
+    "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@{@@@",
@@ -342,6 +345,9 @@
       "-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@[]@@@",
@@ -376,6 +382,9 @@
       "--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@[]@@@",
@@ -408,6 +417,9 @@
       "--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@[]@@@",
@@ -422,6 +434,9 @@
       "--target",
       "Release_x64"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "process_dumps"
   },
   {