ToolbarButton: Reset menu runner before deleting its menu's delegate

chrome/browser/ui/views/toolbar/toolbar_button.cc

 // Copyright 2013 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/ui/views/toolbar/toolbar_button.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 236 matching lines @@
 
   // Need to explicitly clear mouse handler so that events get sent
   // properly after the menu finishes running. If we don't do this, then
   // the first click to other parts of the UI is eaten.
   SetMouseHandler(nullptr);
 
   // Set the state back to normal after the drop down menu is closed.
   if (state() != STATE_DISABLED)
     SetState(STATE_NORMAL);
 
+  menu_runner_.reset();
   menu_model_adapter_.reset();
 }
 
 const char* ToolbarButton::GetClassName() const {
   return "ToolbarButton";
 }