[ozone/wayland] Implement basic keyboard handling support

ui/ozone/platform/wayland/BUILD.gn

Index: ui/ozone/platform/wayland/BUILD.gn
diff --git a/ui/ozone/platform/wayland/BUILD.gn b/ui/ozone/platform/wayland/BUILD.gn
index 494ab6005256fd07c39b6b5353e8c5c29bbdac1f..d13aa550f5dcad643c7fbcf542647d177d36f13c 100644
--- a/ui/ozone/platform/wayland/BUILD.gn
+++ b/ui/ozone/platform/wayland/BUILD.gn
@@ -20,6 +20,8 @@ source_set("wayland") {
     "ozone_platform_wayland.h",
     "wayland_connection.cc",
     "wayland_connection.h",
+    "wayland_keyboard.cc",
+    "wayland_keyboard.h",
     "wayland_object.cc",
     "wayland_object.h",
     "wayland_output.cc",
@@ -37,8 +39,15 @@ source_set("wayland") {
     "//skia",
     "//third_party/wayland:wayland_client",
     "//third_party/wayland-protocols:xdg_shell_protocol",
+    "//ui/base:ui_features",
     "//ui/display",
     "//ui/events",
+
+    # This dependency is needed because XkbkeyboardLayoutEngine ctor takes a
+    # XkbKeyCodeConverter instance.
+    # TODO(tonikitoo): Remove this dependency for non-ChromeOS builds.

[spang, 2017/01/24 23:27:03]

I don't follow. XkbKeyCodeConverter is not in ui/events/ozone/evdev, but in
ui/events/ozone/layout. What's the error?

+    "//ui/events/ozone:events_ozone_evdev",
+    "//ui/events/ozone:events_ozone_layout",
     "//ui/events/platform",
     "//ui/gfx",
     "//ui/gfx/geometry",
@@ -63,6 +72,7 @@ source_set("wayland_unittests") {
     "fake_server.h",
     "mock_platform_window_delegate.cc",
     "wayland_connection_unittest.cc",
+    "wayland_keyboard_unittest.cc",
     "wayland_pointer_unittest.cc",
     "wayland_surface_factory_unittest.cc",
     "wayland_test.cc",