We have a problem in the process on destroying WebContentsImpl because

chrome/browser/extensions/extension_view_host.cc

Index: chrome/browser/extensions/extension_view_host.cc
diff --git a/chrome/browser/extensions/extension_view_host.cc b/chrome/browser/extensions/extension_view_host.cc
index 3bdad604ac7b2ca8bee475cf4e4ce26efb823768..00c200af06426c853abfc1722ef9357692c2b8c0 100644
--- a/chrome/browser/extensions/extension_view_host.cc
+++ b/chrome/browser/extensions/extension_view_host.cc
@@ -43,7 +43,7 @@ class ExtensionViewHost::AssociatedWebContentsObserver
   virtual ~AssociatedWebContentsObserver() {}
 
   // content::WebContentsObserver:
-  virtual void WebContentsDestroyed(WebContents* web_contents) OVERRIDE {
+  virtual void WebContentsDestroyed() OVERRIDE {
     // Deleting |this| from here is safe.
     host_->SetAssociatedWebContents(NULL);
   }