Fix another typo.

ui/views/widget/desktop_root_window_host_linux.cc

 // Copyright (c) 2012 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 "ui/views/widget/desktop_root_window_host_linux.h"
 
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xutil.h>
 
@@ skipping 72 matching lines @@
       current_cursor_(ui::kCursorNull),
       native_widget_delegate_(native_widget_delegate),
       desktop_native_widget_aura_(desktop_native_widget_aura) {
 }
 
 DesktopRootWindowHostLinux::~DesktopRootWindowHostLinux() {
 }
 
 // static
 ui::NativeTheme* DesktopRootWindowHost::GetNativeTheme(aura::Window* window) {
-  return NativeTheme::instance();
+  return ui::NativeTheme::instance();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopRootWindowHostLinux, private:
 
 void DesktopRootWindowHostLinux::InitX11Window(
     const Widget::InitParams& params) {
   unsigned long attribute_mask = CWBackPixmap;
   XSetWindowAttributes swa;
   memset(&swa, 0, sizeof(swa));
@@ skipping 972 matching lines @@
 DesktopRootWindowHost* DesktopRootWindowHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura,
     const gfx::Rect& initial_bounds) {
   return new DesktopRootWindowHostLinux(native_widget_delegate,
                                         desktop_native_widget_aura,
                                         initial_bounds);
 }
 
 }  // namespace views