We have a problem in the process on destroying WebContentsImpl because

chrome/browser/ui/panels/panel_host.cc

Index: chrome/browser/ui/panels/panel_host.cc
diff --git a/chrome/browser/ui/panels/panel_host.cc b/chrome/browser/ui/panels/panel_host.cc
index 9d8bbd3d9c8bc73847a6539448051d12a258c7ff..670ae731fc4749e4ec88b0c47d1073fa1ee294a3 100644
--- a/chrome/browser/ui/panels/panel_host.cc
+++ b/chrome/browser/ui/panels/panel_host.cc
@@ -208,7 +208,7 @@ void PanelHost::RenderProcessGone(base::TerminationStatus status) {
   CloseContents(web_contents_.get());
 }
 
-void PanelHost::WebContentsDestroyed(content::WebContents* web_contents) {
+void PanelHost::WebContentsDestroyed() {
   // Web contents should only be destroyed by us.
   CHECK(!web_contents_.get());