Docserver: Include <h4> tags in the table of contents, it's needed for the API

chrome/common/extensions/docs/server2/template_renderer_test.py

Index: chrome/common/extensions/docs/server2/template_renderer_test.py
diff --git a/chrome/common/extensions/docs/server2/template_renderer_test.py b/chrome/common/extensions/docs/server2/template_renderer_test.py
index d0ddd985822a8b3e692d9d4c678118699c41011e..986b877cb8ccac707c6a735a230ba9b1413d0074 100755
--- a/chrome/common/extensions/docs/server2/template_renderer_test.py
+++ b/chrome/common/extensions/docs/server2/template_renderer_test.py
@@ -21,8 +21,9 @@ class TemplateRendererTest(unittest.TestCase):
 
   def testSimpleWiring(self):
     template = Handlebar('hello {{?true}}{{strings.extension}}{{/}}')
-    self.assertEqual('hello extension',
-                     self._template_renderer.Render(template, None))
+    text, warnings = self._template_renderer.Render(template, None)
+    self.assertEqual('hello extension', text)
+    self.assertEqual([], warnings)
 
 
 if __name__ == '__main__':