Update both GeometryUtils endpoints before conversion

Updating a source node does not force layout for a relativeTo endpoint
in an unrelated display-locked subtree of the same document. Update the
target endpoint separately.

Make the target update unconditional whenever a target exists. A clean
lifecycle update is a no-op. Avoiding endpoint relationship logic keeps
the update correct across shadow trees and future lifecycle changes.

Add WPT coverage using source and target nodes in separate content-
visibility locks.

Bug: 427918516

Change-Id: I082d236c655bb5669f98e8649c9f36313b8ddd02
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/8227484
Reviewed-by: Philip Rogers <pdr@chromium.org>
Reviewed-by: Stefan Zager <szager@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1682689}

Author: jogibear9988

css/cssom-view/cssom-geometryutils-lifecycle.html

@@ -53,4 +53,26 @@
   assert_approx_equals(bounds.y, rect.y - stageRect.y, 0.01,
                        "y coordinate");
 }, "getBoxQuads() immediately after a transform style update");
+
+test(t => {
+  const sourceLock = document.createElement("div");
+  sourceLock.style.contentVisibility = "hidden";
+  const source = document.createElement("div");
+  source.style.cssText = "width:20px;height:20px";
+  sourceLock.appendChild(source);
+
+  const targetLock = document.createElement("div");
+  targetLock.style.contentVisibility = "hidden";
+  const target = document.createElement("div");
+  target.style.cssText = "width:20px;height:20px";
+  targetLock.appendChild(target);
+
+  document.body.append(sourceLock, targetLock);
+  t.add_cleanup(() => {
+    sourceLock.remove();
+    targetLock.remove();
+  });
+
+  assert_equals(source.getBoxQuads({relativeTo: target}).length, 1);
+}, "getBoxQuads() updates unrelated display-locked endpoints");
 </script>