Move Singleton and related structs to namespace base

chrome/browser/ui/libgtk2ui/gtk2_event_loop.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 "chrome/browser/ui/libgtk2ui/gtk2_event_loop.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
 #include <X11/X.h>
 
 #include "base/memory/singleton.h"
 #include "ui/gfx/x/x11_types.h"
 
 namespace libgtk2ui {
 
 // static
 Gtk2EventLoop* Gtk2EventLoop::GetInstance() {
-  return Singleton<Gtk2EventLoop>::get();
+  return base::Singleton<Gtk2EventLoop>::get();
 }
 
 Gtk2EventLoop::Gtk2EventLoop() {
   gdk_event_handler_set(DispatchGdkEvent, NULL, NULL);
 }
 
 Gtk2EventLoop::~Gtk2EventLoop() {
   gdk_event_handler_set(reinterpret_cast<GdkEventFunc>(gtk_main_do_event),
                         NULL, NULL);
 }
@@ skipping 37 matching lines @@
   x_event.xkey.root = DefaultRootWindow(x_event.xkey.display);
   x_event.xkey.time = gdk_event_key.time;
   x_event.xkey.state = gdk_event_key.state;
   x_event.xkey.keycode = gdk_event_key.hardware_keycode;
   x_event.xkey.same_screen = true;
 
   XPutBackEvent(x_event.xkey.display, &x_event);
 }
 
 }  // namespace libgtk2ui