Prevented connecting drag drop events to a SwappedOut RenderViewHost in WebContentsViewGtk

content/browser/web_contents/web_contents_view_gtk.h

Index: content/browser/web_contents/web_contents_view_gtk.h
diff --git a/content/browser/web_contents/web_contents_view_gtk.h b/content/browser/web_contents/web_contents_view_gtk.h
index da1f45c80636612461dc6b0005a4843a4f626f22..2bc22055861c4e1e381d6fe4d39595b717ea3ae5 100644
--- a/content/browser/web_contents/web_contents_view_gtk.h
+++ b/content/browser/web_contents/web_contents_view_gtk.h
@@ -97,6 +97,10 @@ class CONTENT_EXPORT WebContentsViewGtk
   // should be taken that the correct one is hidden/shown.
   void InsertIntoContentArea(GtkWidget* widget);
 
+  // Replaces, or updates, the existing WebDragDestGtk with one for |new_host|.
+  // This must be called when swapping in, or creating a swapped in, RVH.
+  void UpdateDragDest(RenderViewHost* new_host);
+
   // Handle focus traversal on the render widget native view. Can be overridden
   // by subclasses.
   CHROMEGTK_CALLBACK_1(WebContentsViewGtk, gboolean, OnFocus, GtkDirectionType);