Continue deleting code in ui/.

ui/base/win/hwnd_subclass.h

Index: ui/base/win/hwnd_subclass.h
diff --git a/ui/base/win/hwnd_subclass.h b/ui/base/win/hwnd_subclass.h
deleted file mode 100644
index 0a371cb2c8bdf9ed2444e631b99fbe28209b3067..0000000000000000000000000000000000000000
--- a/ui/base/win/hwnd_subclass.h
+++ /dev/null
@@ -1,83 +0,0 @@
-// 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_BASE_WIN_HWND_SUBCLASS_H_
-#define UI_BASE_WIN_HWND_SUBCLASS_H_
-
-#include <windows.h>
-#include <vector>
-
-#include "base/gtest_prod_util.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/base/ui_base_export.h"
-#include "ui/base/view_prop.h"
-
-namespace ui {
-
-// Classes implementing this interface get the opportunity to handle and consume
-// messages before they are sent to their target HWND.
-class UI_BASE_EXPORT HWNDMessageFilter {
- public:
-  virtual ~HWNDMessageFilter();
-
-  // A derived class overrides this method to perform filtering of the messages.
-  // Return true to prevent other HWNDMessageFilter's of the target HWND and the
-  // system message handler |original_wnd_proc_| from receiving the message.
-  // Return false to propagate the message further to other HWNDMessageFilters
-  // and eventually to |original_wnd_proc|.
-  // The order in which HWNDMessageFilters are added in HWNDSubclass::AddFilter
-  // determines which filter gets to see the message first (a filter added first
-  // will see the message first).
-  virtual bool FilterMessage(HWND hwnd,
-                             UINT message,
-                             WPARAM w_param,
-                             LPARAM l_param,
-                             LRESULT* l_result) = 0;
-};
-
-// An object that instance-subclasses a window. If the window has already been
-// instance-subclassed, that subclassing is lost.
-class UI_BASE_EXPORT HWNDSubclass {
- public:
-  ~HWNDSubclass();
-
-  // Adds |filter| to the HWNDSubclass of |target|. Caller retains ownership of
-  // |filter|. See the comment about the order in which filters are added in
-  // HWNDMessageFilter::FilterMessage.
-  static void AddFilterToTarget(HWND target, HWNDMessageFilter* filter);
-
-  // Removes |filter| from any HWNDSubclass that has it.
-  static void RemoveFilterFromAllTargets(HWNDMessageFilter* filter);
-
-  // Returns a non-null HWNDSubclass corresponding to the HWND |target|. Creates
-  // one if none exists. Retains ownership of the returned pointer.
-  static HWNDSubclass* GetHwndSubclassForTarget(HWND target);
-
-  // Adds |filter| if not already added to this HWNDSubclass. Caller retains
-  // ownership of |filter|. See the comment about the order in which filters are
-  // added in HWNDMessageFilter::FilterMessage.
-  void AddFilter(HWNDMessageFilter* filter);
-
-  // Removes |filter|  from this HWNDSubclass instance if present.
-  void RemoveFilter(HWNDMessageFilter* filter);
-
-  LRESULT OnWndProc(HWND hwnd, UINT message, WPARAM w_param, LPARAM l_param);
-
- private:
-  class HWNDSubclassFactory;
-  friend class HWNDSubclassFactory;
-
-  explicit HWNDSubclass(HWND target);
-
-  HWND target_;
-  std::vector<HWNDMessageFilter*> filters_;
-  WNDPROC original_wnd_proc_;
-  ui::ViewProp prop_;
-
-  DISALLOW_COPY_AND_ASSIGN(HWNDSubclass);
-};
-
-}  // namespace ui
-
-#endif  // UI_BASE_WIN_HWND_SUBCLASS_H_