Add PlatformWindow/Event related code for Ozone X11.

ui/platform_window/x11/x11_window_ozone.h

Index: ui/platform_window/x11/x11_window_ozone.h
diff --git a/ui/platform_window/x11/x11_window_ozone.h b/ui/platform_window/x11/x11_window_ozone.h
new file mode 100644
index 0000000000000000000000000000000000000000..2c2d2c7f5b524f3d6a782921683746d2658657be
--- /dev/null
+++ b/ui/platform_window/x11/x11_window_ozone.h
@@ -0,0 +1,39 @@
+// Copyright 2016 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_X11_X11_WINDOW_OZONE_H_
+#define UI_PLATFORM_WINDOW_X11_X11_WINDOW_OZONE_H_
+
+#include "base/macros.h"
+#include "ui/events/platform/x11/x11_event_source_ozone.h"
+#include "ui/platform_window/x11/x11_window_base.h"
+
+namespace ui {
+
+// PlatformWindow implementation for X11 Ozone. PlatformEvents are ui::Events.
+class X11_WINDOW_EXPORT X11WindowOzone : public X11WindowBase,
+                                         public XEventDispatcher {
+ public:
+  explicit X11WindowOzone(PlatformWindowDelegate* delegate);
+  ~X11WindowOzone() override;
+
+  void Create();
+
+  // PlatformWindow:
+  void SetCursor(PlatformCursor cursor) override;
+
+  // XEventDispatcher:
+  bool DispatchXEvent(XEvent* event) override;
+
+ private:
+  // PlatformEventDispatcher:
+  bool CanDispatchEvent(const PlatformEvent& event) override;
+  uint32_t DispatchEvent(const PlatformEvent& event) override;
+
+  DISALLOW_COPY_AND_ASSIGN(X11WindowOzone);
+};
+
+}  // namespace ui
+
+#endif  // UI_PLATFORM_WINDOW_X11_X11_WINDOW_OZONE_H_