Drag and drop between app list and launcher - First patch

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index 93cd61f0806611e2c3356b26932925973bce778a..9d9d1e79900f1e968909e8ae8c4d4b5beb5da0f3 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -643,6 +643,13 @@ void Shell::ToggleAppList(aura::Window* window) {
   app_list_controller_->Toggle(window);
 }
 
+void Shell::SetDragAndDropHostOfCurrentAppList(
+    app_list::ApplicationDragAndDropHost* drag_and_drop_host) {
+  if (app_list_controller_.get())
+    app_list_controller_->SetDragAndDropHostOfCurrentAppList(
+        drag_and_drop_host);
+}
+
 bool Shell::GetAppListTargetVisibility() const {
   return app_list_controller_->GetTargetVisibility();
 }