We don't really want to translate the clip, and furthermore, the picture clip
rect for these pictures is always the max rect, so it's not really what we want.

  https://searchfox.org/mozilla-central/rev/49e78df13e7a505827a3a86daae9efdf827133c6/gfx/wr/webrender/src/display_list_flattener.rs#1472

This fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1496019