Import Cobalt 21.master.0.253153
diff --git a/src/third_party/web_platform_tests/intersection-observer/inline-with-block-child-client-rect.html b/src/third_party/web_platform_tests/intersection-observer/inline-with-block-child-client-rect.html
new file mode 100644
index 0000000..81a8fd1
--- /dev/null
+++ b/src/third_party/web_platform_tests/intersection-observer/inline-with-block-child-client-rect.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="./resources/intersection-observer-test-utils.js"></script>
+
+<style>
+pre, #log {
+ position: absolute;
+ top: 120px;
+ left: 0;
+}
+#target {
+ display: inline;
+}
+</style>
+
+<div id="target">
+ <div>
+ <img width=100 height=100 />
+ </div>
+</div>
+
+<script>
+var vw = document.documentElement.clientWidth;
+var vh = document.documentElement.clientHeight;
+var entries = [];
+var target;
+
+runTestCycle(function() {
+ target = document.getElementById("target");
+ assert_true(!!target, "target exists");
+ var observer = new IntersectionObserver(function(changes) {
+ entries = entries.concat(changes)
+ });
+ observer.observe(target);
+ entries = entries.concat(observer.takeRecords());
+ assert_equals(entries.length, 0, "No initial notifications.");
+ runTestCycle(step0, "First rAF");
+}, "Inline target containing a block child");
+
+function step0() {
+ assert_equals(entries.length, 1);
+ checkRect(entries[0].boundingClientRect, clientBounds(target),
+ "entry.boundingClientRect == target.getBoundingClientRect()");
+}
+</script>
