Update from https://crrev.com/333737

testing/scripts/mojo_apptest.py

Index: testing/scripts/mojo_apptest.py
diff --git a/testing/scripts/webkit_python_tests.py b/testing/scripts/mojo_apptest.py
similarity index 62%
copy from testing/scripts/webkit_python_tests.py
copy to testing/scripts/mojo_apptest.py
index b0c2fbc1c7296da71cc862e88c610bc572d96e6e..09e3f234fd1fb68836ce4f5049807e475560e85d 100755
--- a/testing/scripts/webkit_python_tests.py
+++ b/testing/scripts/mojo_apptest.py
@@ -12,18 +12,17 @@ import common
 
 
 def main_run(args):
-  with common.temporary_file() as tempfile_path:
-    rc = common.run_command([
-        sys.executable,
-        os.path.join(common.SRC_DIR, 'third_party', 'WebKit',
-                     'Tools', 'Scripts', 'test-webkitpy'),
-        '--write-full-results-to', tempfile_path,
-    ])
+  runner = os.path.join(common.SRC_DIR, 'mojo', 'tools', 'apptest_runner.py')
+  tests = os.path.join(common.SRC_DIR, 'mojo', 'tools', 'data', 'apptests')
+  build_dir = os.path.join(common.SRC_DIR, 'out', args.build_config_fs)
 
+  with common.temporary_file() as tempfile_path:
+    rc = common.run_command([runner, tests, build_dir, '--verbose',
+                             '--write-full-results-to', tempfile_path])
     with open(tempfile_path) as f:
       results = json.load(f)
 
-  parsed_results = common.parse_common_test_results(results)
+  parsed_results = common.parse_common_test_results(results, test_separator='.')
   failures = parsed_results['unexpected_failures']
 
   json.dump({
@@ -36,7 +35,7 @@ def main_run(args):
 
 
 def main_compile_targets(args):
-  json.dump([], args.output)
+  json.dump(['mandoline:tests'], args.output)
 
 
 if __name__ == '__main__':