We have a problem in the process on destroying WebContentsImpl because

content/public/browser/web_contents_observer.cc

Index: content/public/browser/web_contents_observer.cc
diff --git a/content/public/browser/web_contents_observer.cc b/content/public/browser/web_contents_observer.cc
index 48fb25a3ae3c2401e2beb0e3a4e0f932765f5e81..3178b188bd5e65d21ab16ef8c6276121664d0bd8 100644
--- a/content/public/browser/web_contents_observer.cc
+++ b/content/public/browser/web_contents_observer.cc
@@ -67,12 +67,9 @@ int WebContentsObserver::routing_id() const {
   return web_contents_->GetRoutingID();
 }
 
-void WebContentsObserver::WebContentsImplDestroyed() {
-  // Do cleanup so that 'this' can safely be deleted from WebContentsDestroyed.
+void WebContentsObserver::ResetWebContents() {
   web_contents_->RemoveObserver(this);
-  WebContentsImpl* contents = web_contents_;
   web_contents_ = NULL;
-  WebContentsDestroyed(contents);
 }
 
 }  // namespace content