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..278beb948fdf738c9455acf53fe0aba21e2dcd21 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 ApplicationDnDHost;
 class AppListView;
 class PaginationModel;
 }
@@ -61,6 +62,10 @@ class AppListController : public ui::EventHandler,
   // Returns app list window or NULL if it is not visible.
   aura::Window* GetWindow();
 
+  // If |dnd_host| is not NULL it will be called upon drag and drop operations
+  // outside the application list.
+  void SetAppListDnDHost(app_list::ApplicationDnDHost* dnd_host);
+
  private:
   // Sets the app list view and attempts to show it.
   void SetView(app_list::AppListView* view);