[stylesheetparser] Newly inputted styles don't load

[Garry Yao]

1. Open stylesheetparser demo page;
2. Load the following source by input (but not from file)

   <style>
   	p.red
   	{
   		color:red;
   	}
   </style>
   <p class="red">some red text</p>
   

3. Check Styles combo;

• Actual Result: The style doesn't show up.

[Garry Yao]

Please leave this to alfonsoml to confirm if it's really a bug or just by design.

[Alfonso Martínez de Lizarrondo]

I'm on travel for three days so don't hold anything for me, but this seems like an improvement for. 3.6.1 unless there's a quick idea that doesn't involve any delay

[Alfonso Martínez de Lizarrondo]

The #8832 patch 1 fixes the problem.