[Ozone-GBM] Adding NativeWindowDelegate to IPC window changes to the GPU

ui/ozone/platform/dri/native_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_OZONE_PLATFORM_DRI_NATIVE_WINDOW_DELEGATE_H_
+#define UI_OZONE_PLATFORM_DRI_NATIVE_WINDOW_DELEGATE_H_
+
+#include "ui/gfx/native_widget_types.h"
+
+namespace gfx {
+class Rect;
+}  // namespace gfx
+
+namespace ui {
+
+class HardwareDisplayController;
+
+// This is a bridge between the browser process and the GPU process for a native
+// window. Since display configuration is done on the GPU process, it needs to
+// know where the native windows are located such that it can map them to a
+// hardware display controller.
+class NativeWindowDelegate {
+ public:
+  virtual ~NativeWindowDelegate() {}
+
+  // Returns the accelerated widget associated with the delegate.
+  virtual gfx::AcceleratedWidget GetWidget() = 0;
+
+  // Returns the current controller the window is displaying on. Callers should
+  // not cache the result as the controller may change as the window is moved.
+  virtual HardwareDisplayController* GetController() = 0;
+
+  // Called when the window is resized/moved.
+  virtual void OnBoundsChanged(const gfx::Rect& bounds) = 0;
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRI_NATIVE_WINDOW_DELEGATE_H_