chromium_tests: apply chromium.get_env() when running tests

scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win10.json

Index: scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win10.json
diff --git a/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win10.json b/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win10.json
index b9ae58ed0594686dae464f86c203adfd68ba2135..3c61774e88703203d4a70fe306a653229a925a81 100644
--- a/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win10.json
+++ b/scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Win10.json
@@ -304,6 +304,9 @@
       "--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@{@@@",
@@ -377,6 +380,9 @@
       "--",
       "--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@{@@@",
@@ -418,6 +424,9 @@
       "chromium.webkit",
       "--debug-rwt-logging"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "webkit_tests",
     "~followup_annotations": [
       "@@@STEP_TEXT@<br/>Total executed: 9001<br/>@@@"
@@ -441,6 +450,9 @@
       "--gs-acl",
       "public-read"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "archive_webkit_tests_results",
     "~followup_annotations": [
       "@@@STEP_LINK@layout_test_results@https://storage.googleapis.com/chromium-layout-test-archives/WebKit_Win10/571/layout-test-results/results.html@@@",
@@ -471,6 +483,9 @@
       "1",
       "browser_tests/Windows-7-SP1/ffffffffff/WebKit Win10/571"
     ],
+    "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@@@"
@@ -496,6 +511,9 @@
       "--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]"
   },
   {
@@ -506,6 +524,9 @@
       "--target",
       "Release"
     ],
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
+    },
     "name": "process_dumps"
   },
   {