Clear any open dialogs when the renderer process goes away.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 98938c00423b896cd4d37c1ae274639e9d6277de..3c0645b6808f569a4e7739225eccfb71b0811685 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -2850,6 +2850,10 @@ void WebContentsImpl::RenderViewTerminated(RenderViewHost* rvh,
     return;
   }
 
+  // Cancel any visible dialogs so they are not left dangling over the sad tab.
+  if (dialog_manager_)
+    dialog_manager_->CancelActiveAndPendingDialogs(this);
+
   ClearPowerSaveBlockers(rvh);
   SetIsLoading(rvh, false, NULL);
   NotifyDisconnected();