Fixes possible crash if the window hosting a menu was closed while the

chrome/browser/views/bookmark_bar_view.cc

Index: chrome/browser/views/bookmark_bar_view.cc
diff --git a/chrome/browser/views/bookmark_bar_view.cc b/chrome/browser/views/bookmark_bar_view.cc
index a1cecbfb745dd0d39d7de73604566b4827136a8a..df16ac7ab1261d7f1dcee8cf88877667bcb9123b 100644
--- a/chrome/browser/views/bookmark_bar_view.cc
+++ b/chrome/browser/views/bookmark_bar_view.cc
@@ -412,6 +412,12 @@ BookmarkBarView::~BookmarkBarView() {
   NotifyModelChanged();
   if (model_)
     model_->RemoveObserver(this);
+
+  // It's possible for the menu to outlive us, reset the observer to make sure
+  // it doesn't have a reference to us.
+  if (bookmark_menu_)
+    bookmark_menu_->set_observer(NULL);
+
   StopShowFolderDropMenuTimer();
 
   if (sync_service_)