Before object destruction, make sure that its select dialogs are told that we

chrome/browser/extensions/extensions_ui.cc

Index: chrome/browser/extensions/extensions_ui.cc
===================================================================
--- chrome/browser/extensions/extensions_ui.cc	(revision 79409)
+++ chrome/browser/extensions/extensions_ui.cc	(working copy)
@@ -847,6 +847,11 @@
 }
 
 ExtensionsDOMHandler::~ExtensionsDOMHandler() {
+  // There may be pending file dialogs, we need to tell them that we've gone
+  // away so they don't try and call back to us.
+  if (load_extension_dialog_.get())
+    load_extension_dialog_->ListenerDestroyed();
+
   if (pack_job_.get())
     pack_job_->ClearClient();