We have a problem in the process on destroying WebContentsImpl because

content/browser/frame_host/interstitial_page_impl.cc

Index: content/browser/frame_host/interstitial_page_impl.cc
diff --git a/content/browser/frame_host/interstitial_page_impl.cc b/content/browser/frame_host/interstitial_page_impl.cc
index 15a232db6d1eb984d4406bdae578173f83f2c9fb..c6a54086cf34385972f2c3bf5626b16fb5e27be6 100644
--- a/content/browser/frame_host/interstitial_page_impl.cc
+++ b/content/browser/frame_host/interstitial_page_impl.cc
@@ -360,14 +360,7 @@ void InterstitialPageImpl::WebContentsWillBeDestroyed() {
   OnNavigatingAwayOrTabClosing();
 }
 
-void InterstitialPageImpl::WebContentsDestroyed(WebContents* web_contents) {
-  // WebContentsImpl will only call WebContentsWillBeDestroyed for interstitial
-  // pages that it knows about, pages that called
-  // WebContentsImpl::AttachInterstitialPage. But it's possible to have an
-  // interstitial page that never progressed that far. In that case, ensure that
-  // this interstitial page is destroyed. (And if it was attached, and
-  // OnNavigatingAwayOrTabClosing was called, it's safe to call
-  // OnNavigatingAwayOrTabClosing twice.)
+void InterstitialPageImpl::WebContentsDestroyed() {
   OnNavigatingAwayOrTabClosing();
 }