Remove OS_CHROMEOS from ui/ash code

chrome/browser/ui/ash/launcher/extension_launcher_context_menu.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 "chrome/browser/ui/ash/launcher/extension_launcher_context_menu.h"
 
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_item_delegate.h"
 #include "base/bind.h"
 #include "chrome/browser/extensions/context_menu_matcher.h"
@@ skipping 67 matching lines @@
     if (!controller()->IsLoggedInAsGuest()) {
       AddItemWithStringId(MENU_NEW_INCOGNITO_WINDOW,
                           IDS_APP_LIST_NEW_INCOGNITO_WINDOW);
     }
   } else if (item().type == ash::TYPE_DIALOG) {
     AddItemWithStringId(MENU_CLOSE, IDS_LAUNCHER_CONTEXT_MENU_CLOSE);
   } else {
     if (item().type == ash::TYPE_PLATFORM_APP)
       AddPinMenu();
     bool show_close_button = controller()->IsOpen(item().id);
-#if defined(OS_CHROMEOS)
     if (extension_misc::IsImeMenuExtensionId(
-            controller()->GetAppIDForShelfID(item().id)))
+            controller()->GetAppIDForShelfID(item().id))) {
       show_close_button = false;
-#endif
+    }
+
     if (show_close_button)
       AddItemWithStringId(MENU_CLOSE, IDS_LAUNCHER_CONTEXT_MENU_CLOSE);
   }
   AddSeparator(ui::NORMAL_SEPARATOR);
   if (item().type == ash::TYPE_APP_SHORTCUT ||
       item().type == ash::TYPE_WINDOWED_APP ||
       item().type == ash::TYPE_PLATFORM_APP) {
     const extensions::MenuItem::ExtensionKey app_key(
         controller()->GetAppIDForShelfID(item().id));
     if (!app_key.empty()) {
@@ skipping 108 matching lines @@
     case MENU_NEW_INCOGNITO_WINDOW:
       controller()->CreateNewIncognitoWindow();
       break;
     default:
       if (extension_items_) {
         extension_items_->ExecuteCommand(command_id, nullptr, nullptr,
                                          content::ContextMenuParams());
       }
   }
 }