Bug 882948 follow-up - Fix the typo that actually breaks the build (not my day...)

layout/style/nsCSSRuleProcessor.cpp

@@ -1210,7 +1210,7 @@ InitSystemMetrics()
         sSystemMetrics->AppendElement(nsGkAtoms::windows_theme_aero);
         break;
       case LookAndFeel::eWindowsTheme_AeroLite:
-        sSystemMetrics->AppendElement(nsGkAtoms::windows_theme_aero_light);
+        sSystemMetrics->AppendElement(nsGkAtoms::windows_theme_aero_lite);
         break;
       case LookAndFeel::eWindowsTheme_LunaBlue:
         sSystemMetrics->AppendElement(nsGkAtoms::windows_theme_luna_blue);