Fix button-pressed handling in ImeDetailedView

ash/common/system/chromeos/ime_menu/ime_list_view.cc

 // Copyright 2016 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 "ash/common/system/chromeos/ime_menu/ime_list_view.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/system/tray/hover_highlight_view.h"
 #include "ash/common/system/tray/ime_info.h"
 #include "ash/common/system/tray/system_menu_button.h"
@@ skipping 378 matching lines @@
       return;
     const std::string key = property->second;
     delegate->ActivateIMEProperty(key);
   }
 
   GetWidget()->Close();
 }
 
 void ImeListView::HandleButtonPressed(views::Button* sender,
                                       const ui::Event& event) {
-  DCHECK(material_keyboard_status_view_);
-  DCHECK_EQ(sender, material_keyboard_status_view_->toggle());
-  WmShell::Get()->ToggleIgnoreExternalKeyboard();
+  if (material_keyboard_status_view_ &&
+      sender == material_keyboard_status_view_->toggle()) {
+    WmShell::Get()->ToggleIgnoreExternalKeyboard();
+  }
 }
 
 }  // namespace ash