Optimize fast-path to only invalidate io when overflow recalc is needed

This patch is a followup to https://crrev.com/1070558 to only do an
invalidation of intersection observer rects when
needs_visual_overflow_recalc_ is true.

Bug: 1382454
Change-Id: Ib9493d7e4894ca192ec7541d19c069b45ca6486c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4025186


Auto-Submit: Philip Rogers <pdr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1072413}