[IntersectionObserver] Add isIntersecting field.

third_party/WebKit/LayoutTests/intersection-observer/remove-element.html

Index: third_party/WebKit/LayoutTests/intersection-observer/remove-element.html
diff --git a/third_party/WebKit/LayoutTests/intersection-observer/remove-element.html b/third_party/WebKit/LayoutTests/intersection-observer/remove-element.html
index f60aa232d8924f72e9dba7e78b02f9bdaadc292b..0417814fd8db27891aa2bd878a51acc07abcfafe 100644
--- a/third_party/WebKit/LayoutTests/intersection-observer/remove-element.html
+++ b/third_party/WebKit/LayoutTests/intersection-observer/remove-element.html
@@ -57,20 +57,20 @@ runTestCycle(function() {
 function step0() {
   root.scrollTop = 150;
   runTestCycle(step1, "root.scrollTop = 150");
-  checkLastEntry(entries, 0, [11, 111, 311, 411, 0, 0, 0, 0, 11, 111, 11, 211, target]);
+  checkLastEntry(entries, 0, [11, 111, 311, 411, 0, 0, 0, 0, 11, 111, 11, 211, false]);
 }
 
 function step1() {
   root.removeChild(target);
   runTestCycle(step2, "root.removeChild(target).");
-  checkLastEntry(entries, 1, [11, 111, 161, 261, 11, 111, 161, 211, 11, 111, 11, 211, target]);
+  checkLastEntry(entries, 1, [11, 111, 161, 261, 11, 111, 161, 211, 11, 111, 11, 211, true]);
 }
 
 function step2() {
   root.scrollTop = 0;
   root.insertBefore(target, trailingSpace);
   runTestCycle(step3, "root.insertBefore(target, trailingSpace).");
-  checkLastEntry(entries, 2, [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, target]);
+  checkLastEntry(entries, 2, [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, false]);
 }
 
 function step3() {
@@ -80,6 +80,6 @@ function step3() {
 }
 
 function step4() {
-  checkLastEntry(entries, 3, [11, 111, 161, 261, 11, 111, 161, 211, 11, 111, 11, 211, target]);
+  checkLastEntry(entries, 3, [11, 111, 161, 261, 11, 111, 161, 211, 11, 111, 11, 211, true]);
 }
 </script>