Implement ui for re-parenting an item from an app list folder to another position or folder in the …

ui/app_list/views/app_list_item_view.h

Index: ui/app_list/views/app_list_item_view.h
diff --git a/ui/app_list/views/app_list_item_view.h b/ui/app_list/views/app_list_item_view.h
index 1dd91b895c8471cfbf709002978d2d9e97febcf7..9a3a5c5ccc9cd7a4fb081ae0c696a5b545cdd537 100644
--- a/ui/app_list/views/app_list_item_view.h
+++ b/ui/app_list/views/app_list_item_view.h
@@ -64,6 +64,13 @@ class APP_LIST_EXPORT AppListItemView : public views::CustomButton,
   // Returns the icon bounds relative to AppListItemView.
   const gfx::Rect& GetIconBounds() const;
 
+  // Sets UI state to dragging state.
+  void SetDragUIState();
+
+  // Returns the icon bounds for the given |target_bounds| as
+  // the assuming bounds of this view.
+  gfx::Rect GetIconBoundsForTargetViewBounds(const gfx::Rect& target_bounds);
+
  private:
   enum UIState {
     UI_STATE_NORMAL,    // Normal UI (icon + label)