Aura desktop: Show resize cursors again.

ui/aura/client/cursor_client.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_CLIENT_CURSOR_CLIENT_H_
+#define UI_AURA_CLIENT_CURSOR_CLIENT_H_
+
+#include "ui/aura/aura_export.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace aura {
+class Window;
+namespace client {
+
+// An interface that receives cursor change events.
+class AURA_EXPORT CursorClient {
+ public:
+  // Notes that |window| has requested the change to |cursor|.
+  virtual void SetCursor(gfx::NativeCursor cursor) = 0;
+
+  // Changes the visibility of the cursor.
+  virtual void ShowCursor(bool show) = 0;
+
+  // Gets whether the cursor is visible.
+  virtual bool IsCursorVisible() const = 0;
+
+ protected:
+  virtual ~CursorClient() {}
+};
+
+// Sets/Gets the activation client for the specified window.
+AURA_EXPORT void SetCursorClient(Window* window,
+                                 CursorClient* client);
+AURA_EXPORT CursorClient* GetCursorClient(Window* window);
+
+}  // namespace client
+}  // namespace aura
+
+#endif  // UI_AURA_CLIENT_CURSOR_CLIENT_H_