Don't always run the script tests if there are no compile targets.

scripts/slave/recipes/chromium_trybot_legacy.expected/arm.json

Index: scripts/slave/recipes/chromium_trybot_legacy.expected/arm.json
diff --git a/scripts/slave/recipes/chromium_trybot_legacy.expected/arm.json b/scripts/slave/recipes/chromium_trybot_legacy.expected/arm.json
index 2461e85af4d59317be751f5c77b41120f637b62b..64bafd7ec95f29c856613b9e1c33fb9648706585 100644
--- a/scripts/slave/recipes/chromium_trybot_legacy.expected/arm.json
+++ b/scripts/slave/recipes/chromium_trybot_legacy.expected/arm.json
@@ -175,77 +175,5 @@
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
-      "[SLAVE_BUILD]/src/testing/scripts/telemetry_unittests.py",
-      "--build-config-fs",
-      "Release",
-      "--paths",
-      "{\"build\": \"[BUILD]\", \"checkout\": \"[SLAVE_BUILD]/src\"}",
-      "--properties",
-      "{\"buildername\": \"linux_arm\", \"buildnumber\": 571, \"slavename\": \"TestSlavename\"}",
-      "run",
-      "--output",
-      "/path/to/tmp/json"
-    ],
-    "name": "telemetry_unittests (with patch)",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"failures\": [], @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"valid\": true@@@",
-      "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
-      "[SLAVE_BUILD]/src/testing/scripts/telemetry_perf_unittests.py",
-      "--build-config-fs",
-      "Release",
-      "--paths",
-      "{\"build\": \"[BUILD]\", \"checkout\": \"[SLAVE_BUILD]/src\"}",
-      "--properties",
-      "{\"buildername\": \"linux_arm\", \"buildnumber\": 571, \"slavename\": \"TestSlavename\"}",
-      "run",
-      "--output",
-      "/path/to/tmp/json"
-    ],
-    "name": "telemetry_perf_unittests (with patch)",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"failures\": [], @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"valid\": true@@@",
-      "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
-      "[SLAVE_BUILD]/src/testing/scripts/nacl_integration.py",
-      "--build-config-fs",
-      "Release",
-      "--paths",
-      "{\"build\": \"[BUILD]\", \"checkout\": \"[SLAVE_BUILD]/src\"}",
-      "--properties",
-      "{\"buildername\": \"linux_arm\", \"buildnumber\": 571, \"slavename\": \"TestSlavename\"}",
-      "run",
-      "--output",
-      "/path/to/tmp/json"
-    ],
-    "name": "nacl_integration (with patch)",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"failures\": [], @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"valid\": true@@@",
-      "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@"
-    ]
   }
 ]