Drag and drop between app list and launcher - First patch

ui/app_list/views/app_list_main_view.h

Index: ui/app_list/views/app_list_main_view.h
diff --git a/ui/app_list/views/app_list_main_view.h b/ui/app_list/views/app_list_main_view.h
index 6225b31a47e1cabf61c4e9e92b3de0cca690fbcb..9206f2054cbd4178ab75f4e823965147dde5d1f1 100644
--- a/ui/app_list/views/app_list_main_view.h
+++ b/ui/app_list/views/app_list_main_view.h
@@ -18,6 +18,7 @@ class Widget;
 
 namespace app_list {
 
+class ApplicationDragAndDropHost;
 class AppListModel;
 class AppListItemModel;
 class AppListViewDelegate;
@@ -47,6 +48,11 @@ class AppListMainView : public views::View,
 
   SearchBoxView* search_box_view() { return search_box_view_; }
 
+  // If |drag_and_drop_host| is not NULL it will be called upon drag and drop
+  // operations outside the application list.
+  void SetDragAndDropHostOfCurrentAppList(
+      ApplicationDragAndDropHost* drag_and_drop_host);
+
  private:
   class IconLoader;