GTK: Now that we depend on gtk 2.18+, replace this pattern:

chrome/browser/ui/gtk/profile_menu_button.cc

 // Copyright (c) 2011 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/gtk/profile_menu_button.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/gtk/gtk_chrome_button.h"
@@ skipping 17 matching lines @@
 
 ProfileMenuButton::~ProfileMenuButton() {}
 
 void ProfileMenuButton::UpdateText(Profile* profile) {
   string16 text = UTF8ToUTF16(
       profile->GetPrefs()->GetString(prefs::kGoogleServicesUsername));
   string16 elided_text = ui::ElideText(text, gfx::Font(), kMaxTextWidth, false);
   gtk_button_set_label(
       GTK_BUTTON(widget_.get()), UTF16ToUTF8(elided_text).c_str());
 
-  if (!text.empty())
-    gtk_widget_show(widget_.get());
-  else
-    gtk_widget_hide(widget_.get());
+  gtk_widget_set_visible(widget_.get(), !text.empty());
 }
 
 gboolean ProfileMenuButton::OnButtonPressed(GtkWidget* widget,
                                             GdkEventButton* event) {
   if (event->button != 1)
     return FALSE;
 
   menu_->PopupForWidget(widget_.get(), event->button, event->time);
   return TRUE;
 }