This is a known problem. A Chromium update is the culprit. You are most likely experiencing GPU acceleration issues. Starting up with the --disable-gpu flag should work. To fix it you need to delete the GPUCache and ShaderCache directories from your profile folder. Deleting the whole profile folder will fix it too, of course, but you will lose all your unsynced data.
This is a known problem. A Chromium update is the culprit. You are most likely experiencing GPU acceleration issues. Starting up with the
--disable-gpuflag should work. To fix it you need to delete the GPUCache and ShaderCache directories from your profile folder. Deleting the whole profile folder will fix it too, of course, but you will lose all your unsynced data.