Add PlatformWindow/Event related code for Ozone X11.

ui/platform_window/x11/x11_window_ozone.cc

+// 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.
+
+#include "ui/platform_window/x11/x11_window_ozone.h"
+
+#include "ui/events/event.h"
+#include "ui/events/ozone/events_ozone.h"
+#include "ui/events/x/events_x_utils.h"
+#include "ui/gfx/geometry/point.h"
+
+namespace ui {
+
+X11WindowOzone::X11WindowOzone(PlatformWindowDelegate* delegate)
+    : X11WindowBase(delegate) {}
+
+X11WindowOzone::~X11WindowOzone() {}
+
+void X11WindowOzone::Create() {
+  DCHECK(X11EventSourceOzone::GetInstance());
+  X11EventSourceOzone::GetInstance()->AddXEventDispatcher(this);
+  X11WindowBase::Create();
+}
+
+void X11WindowOzone::SetCursor(PlatformCursor cursor) {}
+
+bool X11WindowOzone::DispatchXEvent(XEvent* xev) {
+  if (XWindowFromXEvent(*xev) != xwindow_)
+    return false;
+
+  ProcessXWindowEvent(xev);
+  return true;
+}
+
+bool X11WindowOzone::CanDispatchEvent(const PlatformEvent& event) {
+  // This is broken, there is no way to include XID of XWindow in ui::Event.

[sadrul, 2016/02/02 16:33:54]

Should this do things similar to DrmWindowHost::CanDispatchEvent()? Can you add
a TODO?

[kylechar, 2016/02/02 19:01:42]

Either use that type of hack or fix things so that we can include the window id
with the event. I've added a TODO for now.

+  return true;
+}
+
+uint32_t X11WindowOzone::DispatchEvent(const PlatformEvent& platform_event) {
+  Event* event = static_cast<Event*>(platform_event);
+  DispatchEventFromNativeUiEvent(

[sadrul, 2016/02/02 16:33:54]

I don't think we need to use this, and instead can directly dispatch to the
delegate.

[kylechar, 2016/02/02 19:01:42]

I have no idea (I definitely copied this in from the original CL) but it seems
to work fine. Done.

+      event, base::Bind(&PlatformWindowDelegate::DispatchEvent,
+                        base::Unretained(delegate_)));
+
+  return POST_DISPATCH_STOP_PROPAGATION;
+}
+
+}  // namespace ui