Fix for crash in GuestViewBase::FindReply.

components/guest_view/browser/guest_view_base.cc

Index: components/guest_view/browser/guest_view_base.cc
diff --git a/components/guest_view/browser/guest_view_base.cc b/components/guest_view/browser/guest_view_base.cc
index c878c6ecb8525609276cc7c539a626016738674f..7a22151cb3db6b7135d9dfceb77b38af7866b1c7 100644
--- a/components/guest_view/browser/guest_view_base.cc
+++ b/components/guest_view/browser/guest_view_base.cc
@@ -478,6 +478,8 @@ void GuestViewBase::Destroy() {
   StopTrackingEmbedderZoomLevel();
   owner_web_contents_ = nullptr;
 
+  element_instance_id_ = kInstanceIDNone;
+
   DCHECK(web_contents());
 
   // Give the derived class an opportunity to perform some cleanup.