chromeos: Sync animation.

ash/launcher/launcher_model.h

Index: ash/launcher/launcher_model.h
diff --git a/ash/launcher/launcher_model.h b/ash/launcher/launcher_model.h
index d4cd05eb367b522fb15c1bca1c0a95e3b2a65f36..a733a1b6ba4e1f380e416a8f074ebc91056ead6f 100644
--- a/ash/launcher/launcher_model.h
+++ b/ash/launcher/launcher_model.h
@@ -22,6 +22,12 @@ class LauncherModelObserver;
 // Model used by LauncherView.
 class ASH_EXPORT LauncherModel {
  public:
+  enum Status {
+    STATUS_NORMAL,
+    // A status that indicates apps are syncing/loading.
+    STATUS_LOADING,
+  };
+
   LauncherModel();
   ~LauncherModel();
 
@@ -56,6 +62,9 @@ class ASH_EXPORT LauncherModel {
   const LauncherItems& items() const { return items_; }
   int item_count() const { return static_cast<int>(items_.size()); }
 
+  void SetStatus(Status status);
+  Status status() const { return status_; }
+
   void AddObserver(LauncherModelObserver* observer);
   void RemoveObserver(LauncherModelObserver* observer);
 
@@ -68,6 +77,7 @@ class ASH_EXPORT LauncherModel {
   // ID assigned to the next item.
   LauncherID next_id_;
   LauncherItems items_;
+  Status status_;
   ObserverList<LauncherModelObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(LauncherModel);