Move DisplayManager and DisplayChangeObserverX11 from aura to ash.

ui/gfx/screen_win.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_win.h"
 
 #include <windows.h>
 
 #include "base/logging.h"
 #include "ui/gfx/display.h"
@@ skipping 72 matching lines @@
 
 gfx::Display ScreenWin::GetPrimaryDisplay() const {
   MONITORINFO mi = GetMonitorInfoForMonitor(
       MonitorFromWindow(NULL, MONITOR_DEFAULTTOPRIMARY));
   gfx::Display display = GetDisplay(mi);
   DCHECK_EQ(GetSystemMetrics(SM_CXSCREEN), display.size().width());
   DCHECK_EQ(GetSystemMetrics(SM_CYSCREEN), display.size().height());
   return display;
 }
 
+void ScreenWin::AddObserver(DisplayObserver* observer) {
+  // TODO(oshima): crbug.com/122863.
+}
+
+void ScreenWin::RemoveObserver(DisplayObserver* observer) {
+  // TODO(oshima): crbug.com/122863.
+}
+
 HWND ScreenWin::GetHWNDFromNativeView(NativeView window) const {
 #if defined(USE_AURA)
   NOTREACHED();
   return NULL;
 #else
   return window;
 #endif  // USE_AURA
 }
 
 NativeWindow ScreenWin::GetNativeWindowFromHWND(HWND hwnd) const {
 #if defined(USE_AURA)
   NOTREACHED();
   return NULL;
 #else
   return hwnd;
 #endif  // USE_AURA
 }
 
 #if !defined(USE_AURA)
 Screen* CreateNativeScreen() {
   return new ScreenWin;
 }
 #endif  // !USE_AURA
 
 }  // namespace gfx