Add CSS class defines for toolbars and docks.

gtk/gtkstylecontext.h

@@ -128,6 +128,13 @@ struct _GtkStyleContextClass
  */
 #define GTK_STYLE_CLASS_MENUITEM "menuitem"
 
+/**
+ * GTK_STYLE_CLASS_TOOLBAR:
+ *
+ * A CSS class to match toolbars.
+ */
+#define GTK_STYLE_CLASS_TOOLBAR "toolbar"
+
 /**
  * GTK_STYLE_CLASS_RADIO:
  *
@@ -184,6 +191,13 @@ struct _GtkStyleContextClass
  */
 #define GTK_STYLE_CLASS_GRIP "grip"
 
+/**
+ * GTK_STYLE_CLASS_DOCK:
+ *
+ * A widget class defining a dock area
+ */
+#define GTK_STYLE_CLASS_DOCK "dock"
+
 /**
  * GTK_STYLE_CLASS_PROGRESSBAR:
  *