Remove the close button in context menu for IME menu.

chrome/browser/ui/ash/launcher/launcher_context_menu.cc

Index: chrome/browser/ui/ash/launcher/launcher_context_menu.cc
diff --git a/chrome/browser/ui/ash/launcher/launcher_context_menu.cc b/chrome/browser/ui/ash/launcher/launcher_context_menu.cc
index b87d41940ef47bcbf2b55b2ee69f6d00923b547c..ab42a798a778fb7eb10e64e7c3e9820fb11450f7 100644
--- a/chrome/browser/ui/ash/launcher/launcher_context_menu.cc
+++ b/chrome/browser/ui/ash/launcher/launcher_context_menu.cc
@@ -150,7 +150,14 @@ void LauncherContextMenu::Init() {
             MENU_PIN,
             l10n_util::GetStringUTF16(IDS_LAUNCHER_CONTEXT_MENU_PIN));
       }
-      if (controller_->IsOpen(item_.id)) {
+      bool show_close_button = controller_->IsOpen(item_.id);
+#if defined(OS_CHROMEOS)
+      if (extension_misc::IsImeMenuExtensionId(
+              controller_->GetAppIDForShelfID(item_.id))) {
+        show_close_button = false;
+      }
+#endif
+      if (show_close_button) {
         AddItem(MENU_CLOSE,
                 l10n_util::GetStringUTF16(IDS_LAUNCHER_CONTEXT_MENU_CLOSE));
       }