Drag and drop between app list and launcher - First patch

ash/wm/app_list_controller.h

Index: ash/wm/app_list_controller.h
diff --git a/ash/wm/app_list_controller.h b/ash/wm/app_list_controller.h
index d2408d8bac4afba0be8384b8eb541311b07a71eb..6f05d6a97dd784453204f36504f9d1b46bb8d2b9 100644
--- a/ash/wm/app_list_controller.h
+++ b/ash/wm/app_list_controller.h
@@ -19,6 +19,7 @@
 #include "ui/views/widget/widget_observer.h"
 
 namespace app_list {
+class ApplicationDragAndDropHost;
 class AppListView;
 class PaginationModel;
 }
@@ -61,6 +62,11 @@ class AppListController : public ui::EventHandler,
   // Returns app list window or NULL if it is not visible.
   aura::Window* GetWindow();
 
+  // If |drag_and_drop_host| is not NULL it will be called upon drag and drop
+  // operations outside the application list.
+  void SetDragAndDropHostOfCurrentAppList(
+      app_list::ApplicationDragAndDropHost* drag_and_drop_host);
+
  private:
   // Sets the app list view and attempts to show it.
   void SetView(app_list::AppListView* view);