[ozone/wayland] Implement basic keyboard handling support

ui/ozone/platform/wayland/wayland_window.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/ozone/platform/wayland/wayland_window.h"
 
 #include <xdg-shell-unstable-v5-client-protocol.h>
 
 #include "base/bind.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 131 matching lines @@
 
 PlatformImeController* WaylandWindow::GetPlatformImeController() {
   NOTIMPLEMENTED();
   return nullptr;
 }
 
 bool WaylandWindow::CanDispatchEvent(const PlatformEvent& native_event) {
   Event* event = static_cast<Event*>(native_event);
   if (event->IsMouseEvent())
     return has_pointer_focus_;
+  if (event->IsKeyEvent())
+    return has_keyboard_focus_;
   return false;
 }
 
 uint32_t WaylandWindow::DispatchEvent(const PlatformEvent& native_event) {
   DispatchEventFromNativeUiEvent(
       native_event, base::Bind(&PlatformWindowDelegate::DispatchEvent,
                                base::Unretained(delegate_)));
   return POST_DISPATCH_STOP_PROPAGATION;
 }
 
@@ skipping 13 matching lines @@
   window->pending_bounds_ = gfx::Rect(0, 0, width, height);
   window->pending_configure_serial_ = serial;
 }
 
 // static
 void WaylandWindow::Close(void* data, xdg_surface* obj) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace ui