views: Move widget/ directory to ui/views.

views/widget/child_window_message_processor.h

-// Copyright (c) 2010 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 VIEWS_WIDGET_CHILD_WINDOW_MESSAGE_PROCESSOR_H_
-#define VIEWS_WIDGET_CHILD_WINDOW_MESSAGE_PROCESSOR_H_
-#pragma once
-
-#include <windows.h>
-
-namespace ui {
-class ViewProp;
-}
-
-namespace views {
-
-// Windows sends a handful of messages to the parent window rather than the
-// window itself. For example, selection changes of a rich edit (EN_SELCHANGE)
-// are sent to the parent, not the window. Typically such message are best
-// dealt with by the window rather than the parent. NativeWidgetWin allows for
-// registering a ChildWindowMessageProcessor to handle such messages.
-class ChildWindowMessageProcessor {
- public:
-  // Registers |processor| for |hwnd|. The caller takes ownership of the
-  // returned object.
-  static ui::ViewProp* Register(HWND hwnd,
-                                 ChildWindowMessageProcessor* processor);
-
-  // Returns the ChildWindowMessageProcessor for |hwnd|, NULL if there isn't
-  // one.
-  static ChildWindowMessageProcessor* Get(HWND hwnd);
-
-  // Invoked for any messages that are sent to the parent and originated from
-  // the HWND this ChildWindowMessageProcessor was registered for. Returns true
-  // if the message was handled with a valid result in |result|. Returns false
-  // if the message was not handled.
-  virtual bool ProcessMessage(UINT message,
-                              WPARAM w_param,
-                              LPARAM l_param,
-                              LRESULT* result) = 0;
-
- protected:
-  virtual ~ChildWindowMessageProcessor() {}
-};
-
-}  // namespace views
-
-#endif // VIEWS_WIDGET_CHILD_WINDOW_MESSAGE_PROCESSOR_H_