Reland 4e4eae4cbe6136b538a: Make download item drags look like bookmark

ui/views/button_drag_utils.h

Index: ui/views/button_drag_utils.h
diff --git a/ui/views/button_drag_utils.h b/ui/views/button_drag_utils.h
index 8f1a7eedf7d8eec4f8ef408c6f0aadef5a01eb60..360c3e4bc65d2a33d18bb0fe47a453b2bde4cf35 100644
--- a/ui/views/button_drag_utils.h
+++ b/ui/views/button_drag_utils.h
@@ -32,16 +32,16 @@ VIEWS_EXPORT void SetURLAndDragImage(const GURL& url,
                                      const base::string16& title,
                                      const gfx::ImageSkia& icon,
                                      const gfx::Point* press_pt,
-                                     ui::OSExchangeData* data,
-                                     views::Widget* widget);
+                                     const views::Widget& widget,

[Evan Stade, 2017/03/16 00:03:30]

widget isn't allowed to be null and out params are supposed to come at the end.

+                                     ui::OSExchangeData* data);
 
 // As above, but only sets the image.
 VIEWS_EXPORT void SetDragImage(const GURL& url,
                                const base::string16& title,
                                const gfx::ImageSkia& icon,
                                const gfx::Point* press_pt,
-                               ui::OSExchangeData* data,
-                               views::Widget* widget);
+                               const views::Widget& widget,
+                               ui::OSExchangeData* data);
 
 }  // namespace drag_utils