Backed out changeset 04e40870ce3e (bug 1941838) for causing mochitests failures in 1941838.html.

Author: Stanca Serban

webrender/src/quad.rs

@@ -450,15 +450,6 @@ pub fn prepare_quad(
 
                     let rect = int_rect.to_f32();
 
-                    // At extreme scales the rect can round to zero size due to
-                    // f32 precision, causing a panic in new_dynamic, so just
-                    // skip segments that would produce zero size tasks.
-                    // https://bugzilla.mozilla.org/show_bug.cgi?id=1941838#c13
-                    let int_rect_size = int_rect.round().to_i32().size();
-                    if int_rect_size.is_empty() {
-                        continue;
-                    }
-
                     if is_direct {
                         scratch.quad_direct_segments.push(QuadSegment { rect: rect.cast_unit(), task_id: RenderTaskId::INVALID });
                     } else {
@@ -489,7 +480,7 @@ pub fn prepare_quad(
 
                         let task_id = add_render_task_with_mask(
                             &pattern,
-                            int_rect_size,
+                            int_rect.round().to_i32().size(),
                             rect.min,
                             clip_chain.clips_range,
                             prim_spatial_node_index,