[HitTestOpaqueness] Fix for SVG and replaced

1. SVG children has special hit test rules about their shape, fill,
   stroke, etc. For simplicity, assume all SVG children has mixed
   hit test opaqueness. This matters only if the SVG children
   overflow the SVG root or the SVG root is not opaque for hit test.

2. Fix missing hit test opaqueness for replaced elements (including
   SVG root).

Bug: 1413877
Change-Id: Ib90e3ccb4a652b29313787cd03ed06223d00df97
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4779829
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1183963}