Add Observatory mojo_shell hearbeat test

mojo/tools/get_test_list.py

 #!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Central list of tests to run (as appropriate for a given config). Add tests
 to run by modifying this file.
 
 Note that this file is both imported (by mojob.py) and run directly (via a
 recipe)."""
@@ skipping 133 matching lines @@
       sky_command += ["--builder-name", config.values["builder_name"]]
     if config.values.get("build_number"):
       sky_command += ["--build-number", config.values["build_number"]]
     if config.values.get("master_name"):
       sky_command += ["--master-name", config.values["master_name"]]
     if config.values.get("test_results_server"):
       sky_command += ["--test-results-server",
                       config.values["test_results_server"]]
     AddXvfbEntry("Sky tests", sky_command)
 
+  # Observatory tests (Linux-only):
+  if target_os == Config.OS_LINUX:
+    AddEntry("Dart Observatory tests",
+             ["python",
+              os.path.join("mojo", "dart", "observatory_tester", "runner.py"),
+              "--build-dir=" + build_dir,
+              "--dart-exe=third_party/dart-sdk/dart-sdk/bin/dart"])
+
   # mojo tools unit tests:
   if ShouldRunTest(Config.TEST_TYPE_DEFAULT, Config.TEST_TYPE_UNIT, "tools"):
     AddEntry("Mojo tools unit tests",
              ["python", os.path.join("mojo", "tools", "testing",
                                      "mojom_fetcher",
                                      "mojom_fetcher_tests.py")])
   # Perf tests -----------------------------------------------------------------
 
   if target_os == Config.OS_LINUX and ShouldRunTest(Config.TEST_TYPE_PERF):
     perf_id = "linux_%s" % ("debug" if config.is_debug else "release")
@@ skipping 46 matching lines @@
   config = Config(**json.load(args.config_file))
   test_list = GetTestList(config)
   json.dump(test_list, args.test_list_file, indent=2)
   args.test_list_file.write("\n")
 
   return 0
 
 
 if __name__ == "__main__":
   sys.exit(main())