Revert of IntersectionObserver: use an idle callback to send notifications.

third_party/WebKit/LayoutTests/intersection-observer/same-document-no-root.html

Index: third_party/WebKit/LayoutTests/intersection-observer/same-document-no-root.html
diff --git a/third_party/WebKit/LayoutTests/intersection-observer/same-document-no-root.html b/third_party/WebKit/LayoutTests/intersection-observer/same-document-no-root.html
index 5d8a01b82285952ccb694fcc3a6312d4aff068d8..168a2cfce38091a43a5ed2cf94e3eea1f34e1e6f 100644
--- a/third_party/WebKit/LayoutTests/intersection-observer/same-document-no-root.html
+++ b/third_party/WebKit/LayoutTests/intersection-observer/same-document-no-root.html
@@ -6,67 +6,68 @@
 <div style="width:100%; height:700px;"></div>
 
 <script>
-description("Simple intersection observer test with no explicit root and one document.");
-var target = document.getElementById("target");
-var entries = [];
-var observer = new IntersectionObserver(changes => { entries = entries.concat(changes) });
+  description("Simple intersection observer test with no explicit root and one document.");
+  var target = document.getElementById("target");
+  var entries = [];
+  observer_callback = function(changes) {
+    for (var i in changes)
+      entries.push(changes[i]);
+  };
+  var observer = new IntersectionObserver(observer_callback, {});
+  observer.observe(target);
 
-onload = function() {
-  observer.observe(target);
-  entries = entries.concat(observer.takeRecords());
-  shouldBeEqualToNumber("entries.length", 0);
-  document.scrollingElement.scrollTop = 300;
-  // See README for explanation of double RAF.
-  requestAnimationFrame(() => { requestAnimationFrame(step1) });
-};
+  onload = function() {
+    shouldBeEqualToNumber("entries.length", 0);
+    document.scrollingElement.scrollTop = 300;
+    requestAnimationFrame(step1);
+  };
 
-function step1() {
-  entries = entries.concat(observer.takeRecords());
-  shouldBeEqualToNumber("entries.length", 1);
-  if (entries.length > 0) {
-    shouldBeEqualToNumber("entries[0].boundingClientRect.left", 8);
-    shouldBeEqualToNumber("entries[0].boundingClientRect.right", 108);
-    shouldBeEqualToNumber("entries[0].boundingClientRect.top", 408);
-    shouldBeEqualToNumber("entries[0].boundingClientRect.bottom", 508);
-    shouldBeEqualToNumber("entries[0].intersectionRect.left", 8);
-    shouldBeEqualToNumber("entries[0].intersectionRect.right", 108);
-    shouldBeEqualToNumber("entries[0].intersectionRect.top", 408);
-    shouldBeEqualToNumber("entries[0].intersectionRect.bottom", 508);
-    shouldBeEqualToNumber("entries[0].rootBounds.left", 0);
-    shouldBeEqualToNumber("entries[0].rootBounds.right", 785);
-    shouldBeEqualToNumber("entries[0].rootBounds.top", 0);
-    shouldBeEqualToNumber("entries[0].rootBounds.bottom", 600);
-    shouldEvaluateToSameObject("entries[0].target", target);
+  function step1() {
+    setTimeout(function() {
+      shouldBeEqualToNumber("entries.length", 1);
+      shouldBeEqualToNumber("entries[0].boundingClientRect.left", 8);
+      shouldBeEqualToNumber("entries[0].boundingClientRect.right", 108);
+      shouldBeEqualToNumber("entries[0].boundingClientRect.top", 408);
+      shouldBeEqualToNumber("entries[0].boundingClientRect.bottom", 508);
+      shouldBeEqualToNumber("entries[0].intersectionRect.left", 8);
+      shouldBeEqualToNumber("entries[0].intersectionRect.right", 108);
+      shouldBeEqualToNumber("entries[0].intersectionRect.top", 408);
+      shouldBeEqualToNumber("entries[0].intersectionRect.bottom", 508);
+      shouldBeEqualToNumber("entries[0].rootBounds.left", 0);
+      shouldBeEqualToNumber("entries[0].rootBounds.right", 785);
+      shouldBeEqualToNumber("entries[0].rootBounds.top", 0);
+      shouldBeEqualToNumber("entries[0].rootBounds.bottom", 600);
+      shouldEvaluateToSameObject("entries[0].target", target);
 
-    // ClientRect members of IntersectionObserverEntry should be stable.
-    shouldEvaluateToSameObject("entries[0].boundingClientRect", entries[0].boundingClientRect);
-    shouldEvaluateToSameObject("entries[0].intersectionRect", entries[0].intersectionRect);
-    shouldEvaluateToSameObject("entries[0].rootBounds", entries[0].rootBounds);
+      // ClientRect members of IntersectionObserverEntry should be stable.
+      shouldEvaluateToSameObject("entries[0].boundingClientRect", entries[0].boundingClientRect);
+      shouldEvaluateToSameObject("entries[0].intersectionRect", entries[0].intersectionRect);
+      shouldEvaluateToSameObject("entries[0].rootBounds", entries[0].rootBounds);
+
+      document.scrollingElement.scrollTop = 100;
+      requestAnimationFrame(step2);
+    });
   }
-  document.scrollingElement.scrollTop = 100;
-  requestAnimationFrame(step2);
-}
 
-function step2() {
-  entries = entries.concat(observer.takeRecords());
-  shouldBeEqualToNumber("entries.length", 2);
-  if (entries.length > 1) {
-    shouldBeEqualToNumber("entries[1].boundingClientRect.left", 8);
-    shouldBeEqualToNumber("entries[1].boundingClientRect.right", 108);
-    shouldBeEqualToNumber("entries[1].boundingClientRect.top", 608);
-    shouldBeEqualToNumber("entries[1].boundingClientRect.bottom", 708);
-    shouldBeEqualToNumber("entries[1].intersectionRect.left", 0);
-    shouldBeEqualToNumber("entries[1].intersectionRect.right", 0);
-    shouldBeEqualToNumber("entries[1].intersectionRect.top", 0);
-    shouldBeEqualToNumber("entries[1].intersectionRect.bottom", 0);
-    shouldBeEqualToNumber("entries[1].rootBounds.left", 0);
-    shouldBeEqualToNumber("entries[1].rootBounds.right", 785);
-    shouldBeEqualToNumber("entries[1].rootBounds.top", 0);
-    shouldBeEqualToNumber("entries[1].rootBounds.bottom", 600);
-    shouldEvaluateToSameObject("entries[1].target", target);
+  function step2() {
+    setTimeout(function() {
+      shouldBeEqualToNumber("entries.length", 2);
+      shouldBeEqualToNumber("entries[1].boundingClientRect.left", 8);
+      shouldBeEqualToNumber("entries[1].boundingClientRect.right", 108);
+      shouldBeEqualToNumber("entries[1].boundingClientRect.top", 608);
+      shouldBeEqualToNumber("entries[1].boundingClientRect.bottom", 708);
+      shouldBeEqualToNumber("entries[1].intersectionRect.left", 0);
+      shouldBeEqualToNumber("entries[1].intersectionRect.right", 0);
+      shouldBeEqualToNumber("entries[1].intersectionRect.top", 0);
+      shouldBeEqualToNumber("entries[1].intersectionRect.bottom", 0);
+      shouldBeEqualToNumber("entries[1].rootBounds.left", 0);
+      shouldBeEqualToNumber("entries[1].rootBounds.right", 785);
+      shouldBeEqualToNumber("entries[1].rootBounds.top", 0);
+      shouldBeEqualToNumber("entries[1].rootBounds.bottom", 600);
+      shouldEvaluateToSameObject("entries[1].target", target);
+      finishJSTest();
+      document.scrollingElement.scrollTop = 0;
+    });
   }
-  finishJSTest();
-  document.scrollingElement.scrollTop = 0;
-}
 
 </script>