ui/platform_window: Introduce PlatformWindow for windowing primitives.

ui/platform_window/platform_window_delegate.h

+// Copyright 2014 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_PLATFORM_WINDOW_PLATFORM_WINDOW_DELEGATE_H_
+#define UI_PLATFORM_WINDOW_PLATFORM_WINDOW_DELEGATE_H_
+
+#include "ui/gfx/native_widget_types.h"
+#include "ui/platform_window/platform_window_export.h"
+
+namespace gfx {
+class Rect;
+}
+
+namespace ui {
+
+class Event;
+
+enum PlatformWindowState {
+  PLATFORM_WINDOW_STATE_UNKNOWN,
+  PLATFORM_WINDOW_STATE_MAXIMIZED,
+  PLATFORM_WINDOW_STATE_MINIMIZED,
+  PLATFORM_WINDOW_STATE_NORMAL,
+  PLATFORM_WINDOW_STATE_FULLSCREEN,
+};
+
+class PLATFORM_WINDOW_EXPORT PlatformWindowDelegate {
+ public:
+  virtual ~PlatformWindowDelegate() {}
+
+  virtual void OnBoundsChanged(const gfx::Rect& new_bounds) = 0;
+
+  virtual void OnDamageRect(const gfx::Rect& damaged_region) = 0;
+
+  virtual void DispatchEvent(Event* event) = 0;
+
+  virtual void OnCloseRequest() = 0;

[sadrul, 2014/07/14 07:20:05]

In response to https://codereview.chromium.org/378003003/#msg2:

OnCloseRequest() simply indicates that the native-platform has requested the
window to be closed. The delegate can chose to close the window by directly by
calling into PlatformWindow::Close(), or do other things before closing the
window, or simply ignore the request.

+  virtual void OnClosed() = 0;
+
+  virtual void OnWindowStateChanged(PlatformWindowState new_state) = 0;
+
+  virtual void OnLostCapture() = 0;
+
+  virtual void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget) = 0;
+};
+
+}  // namespace ui
+
+#endif  // UI_PLATFORM_WINDOW_PLATFORM_WINDOW_DELEGATE_H_