Compile more targets in foreground/js/ui in gyp v2 (3)

ui/file_manager/file_manager/foreground/js/ui/drag_selector.js

Index: ui/file_manager/file_manager/foreground/js/ui/drag_selector.js
diff --git a/ui/file_manager/file_manager/foreground/js/ui/drag_selector.js b/ui/file_manager/file_manager/foreground/js/ui/drag_selector.js
index f6859bf34fbbc10a1f05359086bab9e5fe4ed7ab..8df39d95050c110d28f27769d631f54a4fcd44d7 100644
--- a/ui/file_manager/file_manager/foreground/js/ui/drag_selector.js
+++ b/ui/file_manager/file_manager/foreground/js/ui/drag_selector.js
@@ -150,12 +150,12 @@ DragSelector.prototype.onMouseMove_ = function(event) {
   borderBounds.height = borderBounds.bottom - borderBounds.top;
 
   // Collect items within the selection rect.
-  var currentSelection = this.target_.getHitElements(
-      borderBounds.left,
-      borderBounds.top,
-      borderBounds.width,
-      borderBounds.height);
-  var pointedElements = this.target_.getHitElements(pos.x, pos.y);
+  var currentSelection = (/** @type {DragTarget} */ (this.target_))
+                             .getHitElements(
+                                 borderBounds.left, borderBounds.top,
+                                 borderBounds.width, borderBounds.height);
+  var pointedElements =
+      (/** @type {DragTarget} */ (this.target_)).getHitElements(pos.x, pos.y);
   var leadIndex = pointedElements.length ? pointedElements[0] : -1;
 
   // Diff the selection between currentSelection and this.lastSelection_.