[ozone/wayland] Implement basic keyboard handling support

ui/ozone/platform/wayland/wayland_connection.cc

Index: ui/ozone/platform/wayland/wayland_connection.cc
diff --git a/ui/ozone/platform/wayland/wayland_connection.cc b/ui/ozone/platform/wayland/wayland_connection.cc
index 520b21f9f08a62f6b17332484c7e0d6a58a115db..eac4c7601f23578c684a76287ad90f21dfa98436 100644
--- a/ui/ozone/platform/wayland/wayland_connection.cc
+++ b/ui/ozone/platform/wayland/wayland_connection.cc
@@ -12,9 +12,16 @@
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
 #include "base/threading/thread_task_runner_handle.h"
+#include "ui/events/ozone/layout/keyboard_layout_engine_manager.h"
 #include "ui/ozone/platform/wayland/wayland_object.h"
 #include "ui/ozone/platform/wayland/wayland_window.h"
 
+#if defined(USE_XKBCOMMON)
+#include "ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.h"
+#else
+#include "ui/events/ozone/layout/stub/stub_keyboard_layout_engine.h"
+#endif
+
 static_assert(XDG_SHELL_VERSION_CURRENT == 5, "Unsupported xdg-shell version");
 
 namespace ui {
@@ -25,7 +32,15 @@ const uint32_t kMaxShmVersion = 1;
 const uint32_t kMaxXdgShellVersion = 1;
 }  // namespace
 
-WaylandConnection::WaylandConnection() {}
+WaylandConnection::WaylandConnection() {
+#if defined(USE_XKBCOMMON)
+  KeyboardLayoutEngineManager::SetKeyboardLayoutEngine(
+      base::MakeUnique<XkbKeyboardLayoutEngine>(codes_));
+#else
+  KeyboardLayoutEngineManager::SetKeyboardLayoutEngine(
+      base::MakeUnique<StubKeyboardLayoutEngine>());
+#endif
+}
 
 WaylandConnection::~WaylandConnection() {}
 
@@ -227,6 +242,20 @@ void WaylandConnection::Capabilities(void* data,
   } else if (connection->pointer_) {
     connection->pointer_.reset();
   }
+  if (capabilities & WL_SEAT_CAPABILITY_KEYBOARD) {
+    if (!connection->keyboard_) {
+      wl_keyboard* keyboard = wl_seat_get_keyboard(connection->seat_.get());
+      if (!keyboard) {
+        LOG(ERROR) << "Failed to get wl_keyboard from seat";
+        return;
+      }
+      connection->keyboard_ = base::MakeUnique<WaylandKeyboard>(
+          keyboard, base::Bind(&WaylandConnection::DispatchUiEvent,
+                               base::Unretained(connection)));
+    }
+  } else if (connection->keyboard_) {
+    connection->keyboard_.reset();
+  }
   connection->ScheduleFlush();
 }