chromium_tests: apply chromium.get_env() when running tests

scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win_x64_Builder__dbg_.json

Index: scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win_x64_Builder__dbg_.json
diff --git a/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win_x64_Builder__dbg_.json b/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win_x64_Builder__dbg_.json
index 87ecc164f58a53ec69a896dc72e0761fb724935b..0bfb53b391771e8841fdcf6c16a71d2f75bcf0b7 100644
--- a/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win_x64_Builder__dbg_.json
+++ b/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win_x64_Builder__dbg_.json
@@ -383,6 +383,9 @@
       "--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@{@@@",
@@ -400,6 +403,9 @@
       "\nimport sys\nprint '*.isolated file for target %s is missing' % sys.argv[1]\nsys.exit(1)\n",
       "browser_tests"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "[error] browser_tests",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -416,6 +422,9 @@
       "\nimport sys\nprint '%s wasn\\'t triggered' % sys.argv[1]\nsys.exit(1)\n",
       "browser_tests"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "[collect error] browser_tests",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -433,6 +442,9 @@
       "--target",
       "Debug_x64"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "process_dumps"
   },
   {