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

chrome/browser/views/bookmark_bar_view.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/views/bookmark_bar_view.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 #include <vector>
@@ skipping 394 matching lines @@
   if (IsAlwaysShown())
     size_animation_->Reset(1);
   else
     size_animation_->Reset(0);
 }
 
 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_)
     sync_service_->RemoveObserver(this);
 }
 
 void BookmarkBarView::SetProfile(Profile* profile) {
   DCHECK(profile);
   if (profile_ == profile)
     return;
@@ skipping 1280 matching lines @@
   // The tooltip is the only way we have to display text explaining the error
   // to the user.
   sync_error_button->SetTooltipText(
       l10n_util::GetString(IDS_SYNC_BOOKMARK_BAR_ERROR_DESC));
   sync_error_button->SetAccessibleName(
       l10n_util::GetString(IDS_ACCNAME_SYNC_ERROR_BUTTON));
   sync_error_button->SetIcon(
       *ResourceBundle::GetSharedInstance().GetBitmapNamed(IDR_WARNING));
   return sync_error_button;
 }