Fix the build fix in 2168bce.

```
../../ozone/wayland/input/cursor.cc:89:59: error: 'wl_cursor_image* 
ozonewayland::WaylandCursorData::GetCursorImage' is not a static member of
'class ozonewayland::WaylandCursorData'
../../ozone/wayland/input/cursor.cc:89:59: error: 'CursorType' was not 
declared in this scope
../../ozone/wayland/input/cursor.cc:89:76: error: expected ',' or ';' before
'{' token
```

With GCC 4.8.2 in C++11 mode.