Fix switch in apptests file

mojo/tools/data/apptests

 # This file contains a list of Mojo gtest unit tests.
 #
 # This must be valid Python. It may use the |config| global that will be a
 # mopy.config.Config object, and must set a |tests| global that will contain the
 # list of tests to run.
 #
 # The entries in |tests| are dictionaries of the following form:
 #   {
 #     # Required URL for apptest.
 #     'test': 'mojo:test_app_url',
@@ skipping 52 matching lines @@
       'name': 'mojo:html_viewer_apptests OOPIFS',
       'type': 'gtest_isolated',
       'args': ['--use-test-config', '--oopifs',
                '--enable-html-viewer-test-interface']
     },
     {
       'test': 'mojo:html_viewer_apptests',
       'name': 'mojo:html_viewer_apptests OOPIFS new frame',
       'type': 'gtest_isolated',
       'args': ['--use-test-config', '--oopifs',
-              'oopif-always-create-new-frame-tree',
+               '--oopif-always-create-new-frame-tree',
                '--enable-html-viewer-test-interface']
     },
     {
       'test': 'mojo:mandoline_browser_apptests',
       'type': 'gtest_isolated',
       'args': ['--use-headless-config']
     },
     {
       'test': 'mojo:mandoline_frame_apptests',
       'type': 'gtest_isolated',
       'args': ['--use-headless-config']
     },
     # TODO(xhwang): Fix and enable mojo:media_pipeline_integration_apptests.
     # http://crbug.com/501417
     {
       'test': 'mojo:media_apptests',
       'type': 'gtest_isolated',
     },
     {
       'test': 'mojo:sql_apptests',
       'type': 'gtest_isolated',
     },
   ]