views: Make the LogoutButton not visible instead of early out in Paint

ash/system/user/user_view.cc

 // Copyright 2014 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/system/user/user_view.h"
 
 #include <algorithm>
 
 #include "ash/multi_profile_uma.h"
 #include "ash/popup_message.h"
@@ skipping 71 matching lines @@
 
 class LogoutButton : public TrayPopupLabelButton {
  public:
   // If |placeholder| is true, button is used as placeholder. That means that
   // button is inactive and is not painted, but consume the same ammount of
   // space, as if it was painted.
   LogoutButton(views::ButtonListener* listener,
                const base::string16& text,
                bool placeholder)
       : TrayPopupLabelButton(listener, text), placeholder_(placeholder) {
-    SetEnabled(!placeholder_);
+    SetVisible(!placeholder_);
   }
 
   ~LogoutButton() override {}
 
  private:
-  void Paint(gfx::Canvas* canvas, const views::CullSet& cull_set) override {
-    // Just skip paint if this button used as a placeholder.
-    if (!placeholder_)
-      TrayPopupLabelButton::Paint(canvas, cull_set);
-  }
-
   bool placeholder_;
   DISALLOW_COPY_AND_ASSIGN(LogoutButton);
 };
 
 class UserViewMouseWatcherHost : public views::MouseWatcherHost {
  public:
   explicit UserViewMouseWatcherHost(const gfx::Rect& screen_area)
       : screen_area_(screen_area) {}
   ~UserViewMouseWatcherHost() override {}
 
@@ skipping 447 matching lines @@
   focus_manager_ = NULL;
   if (user_card_view_->GetFocusManager())
     user_card_view_->GetFocusManager()->ClearFocus();
   popup_message_.reset();
   mouse_watcher_.reset();
   add_menu_option_.reset();
 }
 
 }  // namespace tray
 }  // namespace ash