MacViews: Fix MenuRunnerTests which fail with asan enabled.

ui/views/controls/menu/menu_controller.cc

 // Copyright (c) 2012 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 "ui/views/controls/menu/menu_controller.h"
 
 #include "base/i18n/case_conversion.h"
 #include "base/i18n/rtl.h"
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 1012 matching lines @@
       exit_type() == MenuController::EXIT_DESTROYED) {
     TerminateNestedMessageLoopIfNecessary();
     return ui::POST_DISPATCH_PERFORM_DEFAULT;
   }
 
   if (character)
     SelectByChar(character);
   else
     OnKeyDown(key_code);
 
-  TerminateNestedMessageLoopIfNecessary();
+  // MenuController may have been deleted, so check for an active instance
+  // before accessing member variables.
+  if (GetActiveInstance())
+    TerminateNestedMessageLoopIfNecessary();
 
   return ui::POST_DISPATCH_NONE;
 }
 
 void MenuController::UpdateSubmenuSelection(SubmenuView* submenu) {
   if (submenu->IsShowing()) {
     gfx::Point point = gfx::Screen::GetScreen()->GetCursorScreenPoint();
     const SubmenuView* root_submenu =
         submenu->GetMenuItem()->GetRootMenuItem()->GetSubmenu();
     View::ConvertPointFromScreen(
@@ skipping 1620 matching lines @@
     return;
   }
   if (hot_button_)
     hot_button_->SetHotTracked(false);
   hot_button_ = hot_button;
   if (hot_button)
     hot_button->SetHotTracked(true);
 }
 
 }  // namespace views