Use a python script to configure unit tests and app tests to run.

mojo/tools/test_runner.py

Index: mojo/tools/test_runner.py
diff --git a/mojo/tools/test_runner.py b/mojo/tools/test_runner.py
index 5e3e3b87b07e044a6df616174287cfe7688733fd..16a855b9f502f8ef7af2e08d8e791d3e3ee6d2ad 100755
--- a/mojo/tools/test_runner.py
+++ b/mojo/tools/test_runner.py
@@ -41,12 +41,16 @@ def main():
                       nargs='?')
   args = parser.parse_args()
 
+  config = ConfigForGNArgs(ParseGNConfig(args.root_dir))
+
   _logging.debug("Test list file: %s", args.gtest_list_file)
-  gtest_list = ast.literal_eval(args.gtest_list_file.read())
+  execution_globals = {
+      "config": config,
+  }
+  exec args.gtest_list_file in execution_globals
+  gtest_list = execution_globals["tests"]
   _logging.debug("Test list: %s" % gtest_list)
 
-  config = ConfigForGNArgs(ParseGNConfig(args.root_dir))
-
   print "Running tests in directory: %s" % args.root_dir
   os.chdir(args.root_dir)
 
@@ -76,11 +80,6 @@ def main():
   successes_cache_file = open(args.successes_cache_filename, 'ab') \
       if args.successes_cache_filename else None
   for gtest_dict in gtest_list:
-    if gtest_dict.get("disabled"):
-      continue
-    if not config.match_target_os(gtest_dict.get("target_os", [])):
-      continue
-
     gtest = gtest_dict["test"]
     cacheable = gtest_dict.get("cacheable", True)
     if not cacheable: