How do I change the font size of the Eclipse editor tab's title (in Eclipse v4.4 (Luna))?

Question

I want to achieve the same effect as in Stack Overflow question How to change the font size of the Eclipse editor tab's title, but in Eclipse v4.4 (Luna).

Answer 1

The CSS files in Eclipse 4.4 Luna M6 are now in the org.eclipse.ui.themes plugin.

Since Luna is still under development things may still change.