Schedule a type selector invalidation set for RuleSet invalidations.

third_party/WebKit/LayoutTests/fast/css/invalidation/sheet-ruleset-invalidation.html

Index: third_party/WebKit/LayoutTests/fast/css/invalidation/sheet-ruleset-invalidation.html
diff --git a/third_party/WebKit/LayoutTests/fast/css/invalidation/sheet-ruleset-invalidation.html b/third_party/WebKit/LayoutTests/fast/css/invalidation/sheet-ruleset-invalidation.html
index e8a7c780b3a0342601fd4fb64d166c0e87864d34..d513ff27d29d9da3dd2c5aa4918d3c1c7578b5b8 100644
--- a/third_party/WebKit/LayoutTests/fast/css/invalidation/sheet-ruleset-invalidation.html
+++ b/third_party/WebKit/LayoutTests/fast/css/invalidation/sheet-ruleset-invalidation.html
@@ -8,13 +8,39 @@
     <div></div>
     <div></div>
     <div></div>
+    <div id="found">
+        <div></div>
+    </div>
     <span></span>
 </div>
 <script>
     test(() => {
-        assert_true(!!window.internals, "Test requires window.internals.");
+        assert_true(!!window.internals, "Tests require window.internals.");
+    }, "Test for prerequisites.");
+
+    function applyRuleAndReturnAffectedElementCount(ruleString) {
         document.body.offsetTop;
-        document.styleSheets[0].insertRule("span{background:green}", 0);
-        assert_equals(internals.updateStyleAndReturnAffectedElementCount(), 1, "Check that only the span is affected.");
-    }, "Inserting a style rule with a type selector should only invalidate elements with that type.");
+        document.styleSheets[0].insertRule(ruleString, 0);
+        var recalcCount = internals.updateStyleAndReturnAffectedElementCount();
+        document.styleSheets[0].removeRule();
+        return recalcCount;
+    }
+
+    test(() => {
+        assert_equals(applyRuleAndReturnAffectedElementCount(
+            "span { background: green }"), 1,
+            "Check that only the span is affected.");
+    }, "A style rule with a type selector should only invalidate elements with that type.");
+
+    test(() => {
+        assert_equals(applyRuleAndReturnAffectedElementCount(
+            "#notfound div { background: red }"), 0,
+            "Check that none of divs are recalculated.");
+    }, "A type selector scoped in an unknown id should not invalidate any elements.");
+
+    test(() => {
+        assert_equals(applyRuleAndReturnAffectedElementCount(
+            "#found div { background: red }"), 1,
+            "Check that only one of the divs is recalculated.");
+    }, "A type selector scoped by a known id should only invalidate descendants of the element with that id.");
 </script>