[cheese] Use GtkIconTheme built-in RTL support

[David King <davidk src gnome org>]

commit 43789f571d956199c9eff25253918c1c20f8650b
Author: David King <amigadave amigadave com>
Date:   Thu Aug 7 18:12:04 2014 +0100

    Use GtkIconTheme built-in RTL support

 data/cheese-main-window.ui |    2 ++
 src/cheese-window.vala     |   15 ---------------
 2 files changed, 2 insertions(+), 15 deletions(-)
---
diff --git a/data/cheese-main-window.ui b/data/cheese-main-window.ui
index 4118e36..c0ff90f 100644
--- a/data/cheese-main-window.ui
+++ b/data/cheese-main-window.ui
@@ -119,6 +119,7 @@
                             <property name="visible">True</property>
                             <child>
                               <object class="GtkImage" id="effects_prev_page_button_image">
+                                <property name="icon-name">go-previous-symbolic</property>
                                 <property name="visible">True</property>
                               </object>
                             </child>
@@ -155,6 +156,7 @@
                             <property name="visible">True</property>
                             <child>
                               <object class="GtkImage" id="effects_next_page_button_image">
+                                <property name="icon-name">go-next-symbolic</property>
                                 <property name="visible">True</property>
                               </object>
                             </child>
diff --git a/src/cheese-window.vala b/src/cheese-window.vala
index 9d8aac5..4c9dff3 100644
--- a/src/cheese-window.vala
+++ b/src/cheese-window.vala
@@ -72,10 +72,6 @@ public class Cheese.MainWindow : Gtk.ApplicationWindow
     [GtkChild]
     private Gtk.ToggleButton effects_toggle_button;
     [GtkChild]
-    private Gtk.Image effects_prev_page_button_image;
-    [GtkChild]
-    private Gtk.Image effects_next_page_button_image;
-    [GtkChild]
     private Gtk.Widget buttons_area;
     private Gtk.Menu thumbnail_popup;
 
@@ -133,17 +129,6 @@ public class Cheese.MainWindow : Gtk.ApplicationWindow
             header_bar.visible = true;
             this.set_titlebar (header_bar);
         }
-
-        if (get_direction () == Gtk.TextDirection.RTL)
-        {
-            effects_prev_page_button_image.icon_name = "go-previous-rtl-symbolic";
-            effects_next_page_button_image.icon_name = "go-next-rtl-symbolic";
-        }
-        else
-        {
-            effects_prev_page_button_image.icon_name = "go-previous-symbolic";
-            effects_next_page_button_image.icon_name = "go-next-symbolic";
-        }
     }
 
     private void set_window_title (string title)