Revert 152221 - chromeos: Sync animation.

ash/launcher/launcher_model_observer.h

Index: ash/launcher/launcher_model_observer.h
===================================================================
--- ash/launcher/launcher_model_observer.h	(revision 152351)
+++ ash/launcher/launcher_model_observer.h	(working copy)
@@ -25,13 +25,10 @@
   // of the arguments.
   virtual void LauncherItemMoved(int start_index, int target_index) = 0;
 
-  // Invoked when the state of an item changes. |old_item| is the item
+  // Invoked when the the state of an item changes. |old_item| is the item
   // before the change.
   virtual void LauncherItemChanged(int index, const LauncherItem& old_item) = 0;
 
-  // Invoked when launcher status is changed.
-  virtual void LauncherStatusChanged() = 0;
-
  protected:
   virtual ~LauncherModelObserver() {}
 };