Split off LayoutManager deprecated functions to a separate file

This should make it easier to clean up later when we branch off for
1.99.

clutter/deprecated/clutter-layout-manager-deprecated.c

@@ -0,0 +1,89 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "clutter-layout-manager.h"
+
+/**
+ * clutter_layout_manager_begin_animation:
+ * @manager: a #ClutterLayoutManager
+ * @duration: the duration of the animation, in milliseconds
+ * @mode: the easing mode of the animation
+ *
+ * Begins an animation of @duration milliseconds, using the provided
+ * easing @mode
+ *
+ * The easing mode can be specified either as a #ClutterAnimationMode
+ * or as a logical id returned by clutter_alpha_register_func()
+ *
+ * The result of this function depends on the @manager implementation
+ *
+ * Return value: (transfer none): The #ClutterAlpha created by the
+ *   layout manager; the returned instance is owned by the layout
+ *   manager and should not be unreferenced
+ *
+ * Since: 1.2
+ *
+ * Deprecated: 1.12
+ */
+ClutterAlpha *
+clutter_layout_manager_begin_animation (ClutterLayoutManager *manager,
+                                        guint                 duration,
+                                        gulong                mode)
+{
+  ClutterLayoutManagerClass *klass;
+
+  g_return_val_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager), NULL);
+
+  klass = CLUTTER_LAYOUT_MANAGER_GET_CLASS (manager);
+
+  return klass->begin_animation (manager, duration, mode);
+}
+
+/**
+ * clutter_layout_manager_end_animation:
+ * @manager: a #ClutterLayoutManager
+ *
+ * Ends an animation started by clutter_layout_manager_begin_animation()
+ *
+ * The result of this call depends on the @manager implementation
+ *
+ * Since: 1.2
+ *
+ * Deprecated: 1.12
+ */
+void
+clutter_layout_manager_end_animation (ClutterLayoutManager *manager)
+{
+  g_return_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager));
+
+  CLUTTER_LAYOUT_MANAGER_GET_CLASS (manager)->end_animation (manager);
+}
+
+/**
+ * clutter_layout_manager_get_animation_progress:
+ * @manager: a #ClutterLayoutManager
+ *
+ * Retrieves the progress of the animation, if one has been started by
+ * clutter_layout_manager_begin_animation()
+ *
+ * The returned value has the same semantics of the #ClutterAlpha:alpha
+ * value
+ *
+ * Return value: the progress of the animation
+ *
+ * Since: 1.2
+ *
+ * Deprecated: 1.12
+ */
+gdouble
+clutter_layout_manager_get_animation_progress (ClutterLayoutManager *manager)
+{
+  ClutterLayoutManagerClass *klass;
+
+  g_return_val_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager), 1.0);
+
+  klass = CLUTTER_LAYOUT_MANAGER_GET_CLASS (manager);
+
+  return klass->get_animation_progress (manager);
+}