[metacity] prefs: add theme preference

[Alberts Muktupāvels <muktupavels src gnome org>]

commit b6e140de066df0690b2aa0fc8f0e1734731d5445
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Thu Feb 19 18:22:15 2015 +0200

    prefs: add theme preference

 src/core/prefs.c                      |    2 +-
 src/org.gnome.metacity.gschema.xml.in |    8 ++++++++
 2 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/src/core/prefs.c b/src/core/prefs.c
index 49fa86c..5d3d23a 100644
--- a/src/core/prefs.c
+++ b/src/core/prefs.c
@@ -378,7 +378,7 @@ static MetaStringPreference preferences_string[] =
     },
     {
       { "theme",
-        SCHEMA_GENERAL,
+        SCHEMA_METACITY,
         META_PREF_THEME,
       },
       theme_name_handler,
diff --git a/src/org.gnome.metacity.gschema.xml.in b/src/org.gnome.metacity.gschema.xml.in
index dbbb642..94628d0 100644
--- a/src/org.gnome.metacity.gschema.xml.in
+++ b/src/org.gnome.metacity.gschema.xml.in
@@ -62,6 +62,14 @@
         Alt-Tab window instead of only icons.
       </_description>
     </key>
+    <key name="theme" type="s">
+      <default>'Adwaita'</default>
+      <_summary>Current theme</_summary>
+      <_description>
+        The theme determines the appearance of window borders, titlebar,
+        and so forth.
+      </_description>
+    </key>
   </schema>
 
 </schemalist>