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..7fd3bcff7afc1de79d7fe843ca2308ba1f94a5c4 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 ApplicationDnDHost;
 class AppListModel;
 class AppListItemModel;
 class AppListViewDelegate;
@@ -47,6 +48,10 @@ class AppListMainView : public views::View,
 
   SearchBoxView* search_box_view() { return search_box_view_; }
 
+  // If |dnd_host| is not NULL it will be called upon drag and drop operations
+  // outside the application list.
+  void SetAppListDnDHost(ApplicationDnDHost* dnd_host);
+
  private:
   class IconLoader;