Fix the html select tag showing up at the wrong position. This was a regression from r166446.

ui/aura/root_window_host_win.h

 // 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.
 
 #ifndef UI_AURA_ROOT_WINDOW_HOST_WIN_H_
 #define UI_AURA_ROOT_WINDOW_HOST_WIN_H_
 
 #include "base/compiler_specific.h"
 #include "ui/aura/root_window_host.h"
 #include "ui/base/win/window_impl.h"
@@ skipping 45 matching lines @@
     MESSAGE_HANDLER_EX(WM_KEYDOWN, OnKeyEvent)
     MESSAGE_HANDLER_EX(WM_KEYUP, OnKeyEvent)
     MESSAGE_HANDLER_EX(WM_SYSKEYDOWN, OnKeyEvent)
     MESSAGE_HANDLER_EX(WM_SYSKEYUP, OnKeyEvent)
     MESSAGE_HANDLER_EX(WM_CHAR, OnKeyEvent)
     MESSAGE_HANDLER_EX(WM_SYSCHAR, OnKeyEvent)
     MESSAGE_HANDLER_EX(WM_IME_CHAR, OnKeyEvent)
     MESSAGE_HANDLER_EX(WM_NCACTIVATE, OnNCActivate)
 
     MSG_WM_CLOSE(OnClose)
+    MSG_WM_MOVE(OnMove)
     MSG_WM_PAINT(OnPaint)
     MSG_WM_SIZE(OnSize)
   END_MSG_MAP()
 
   void OnClose();
   LRESULT OnKeyEvent(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnMouseRange(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnCaptureChanged(UINT message, WPARAM w_param, LPARAM l_param);
   LRESULT OnNCActivate(UINT message, WPARAM w_param, LPARAM l_param);
+  void OnMove(const CPoint& point);
   void OnPaint(HDC dc);
   void OnSize(UINT param, const CSize& size);
 
   RootWindowHostDelegate* delegate_;
 
   bool fullscreen_;
   bool has_capture_;
   RECT saved_window_rect_;
   DWORD saved_window_style_;
   DWORD saved_window_ex_style_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindowHostWin);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_HOST_WIN_H_