Stop running pub get at gclient sync time and fix build bugs

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 139 matching lines @@
     AddEntry("Mojo tools unit tests",
              ["python", os.path.join("mojo", "tools", "testing",
                                      "mojom_fetcher",
                                      "mojom_fetcher_tests.py")])
 
   # Dart mojom package generate.dart script tests:
   if target_os == Config.OS_LINUX:
     AddEntry("Dart mojom package generate tests",
         [os.path.join("third_party", "dart-sdk", "dart-sdk", "bin", "dart"),
          "--checked",
-         "-p", os.path.join("mojo", "public", "dart", "mojom", "packages"),
+         "-p", os.path.join(build_dir, "gen", "dart-pkg", "packages"),
          os.path.join(
            "mojo", "public", "dart", "mojom", "test", "generate_test.dart")])
 
   if target_os == Config.OS_LINUX:
     AddEntry("Dart snapshotter test",
         ["python",
          os.path.join("mojo", "dart", "dart_snapshotter", "test",
                       "dart_snapshotter_test.py"),
          "--build-dir=" + build_dir])
 
@@ skipping 51 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())