Get the custom frame limping with win-aura.

ui/gfx/screen_aura.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/gfx/screen.h"
 
 #include "base/logging.h"
 #include "ui/gfx/monitor.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/screen_impl.h"
 
 namespace gfx {
 
 // gfx can't depend upon aura, otherwise we have circular dependencies. So,
 // gfx::Screen is pluggable and Desktop plugs in the real implementation.
 namespace {
 ScreenImpl* g_instance_ = NULL;
 }
 
 // static
 void Screen::SetInstance(ScreenImpl* screen) {
   delete g_instance_;
   g_instance_ = screen;
 }
 
-#if defined(USE_ASH)
 // TODO(oshima): Implement ScreenImpl for Linux/aura and remove this
 // ifdef.
 
 // static
 Point Screen::GetCursorScreenPoint() {
   return g_instance_->GetCursorScreenPoint();
 }
 
 // static
 NativeWindow Screen::GetWindowAtCursorScreenPoint() {
@@ skipping 18 matching lines @@
 // static
 Monitor Screen::GetPrimaryMonitor() {
   return g_instance_->GetPrimaryMonitor();
 }
 
 // static
 Monitor Screen::GetMonitorMatching(const gfx::Rect& match_rect) {
   return g_instance_->GetMonitorNearestPoint(match_rect.CenterPoint());
 }
 
-#endif
-
 }  // namespace gfx