Update old terminology in a comment.

Change-Id: I186d1194c1c02d1629371a90cbfc59663a6a247e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2006414
Commit-Queue: Alex Newcomer <newcomer@chromium.org>
Commit-Queue: Matthew Mourgos <mmourgos@chromium.org>
Auto-Submit: Alex Newcomer <newcomer@chromium.org>
Reviewed-by: Matthew Mourgos <mmourgos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#732647}

ash/app_list/views/app_list_drag_and_drop_host.h

@@ -20,7 +20,7 @@ class View;
 namespace ash {
 
 // This class will get used by the AppListView to drag and drop Application
-// shortcuts onto another host (the launcher).
+// shortcuts onto another host (the shelf).
 class ApplicationDragAndDropHost {
  public:
   // Creates an OS dependent drag proxy icon which can escape the given view.