Use high resolution markers when device scale factor > 1.5f

It's an upstream regression introduced in Blink r151453 when non-compositing
code path was removed but the setHighResMarkers() was left out.

BUG=261123

Review URL: https://chromiumcodereview.appspot.com/19579003

git-svn-id: svn://svn.chromium.org/blink/trunk@154533 bbb929c8-8fbe-4397-9dbb-9b2b20218538