Handle nested position:sticky elements correctly (compositor)

third_party/WebKit/LayoutTests/compositing/overflow/composited-nested-sticky-deep-expected.html

Index: third_party/WebKit/LayoutTests/compositing/overflow/composited-nested-sticky-deep-expected.html
diff --git a/third_party/WebKit/LayoutTests/compositing/overflow/composited-nested-sticky-deep-expected.html b/third_party/WebKit/LayoutTests/compositing/overflow/composited-nested-sticky-deep-expected.html
new file mode 100644
index 0000000000000000000000000000000000000000..178745ad276797abb4693f51b12ba149f643aa42
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/compositing/overflow/composited-nested-sticky-deep-expected.html
@@ -0,0 +1,58 @@
+<style>
+body {
+  margin: 0;
+}
+
+.container {
+  width: 200px;
+  height: 500px;
+  outline: 2px solid black;
+}
+
+.first {
+  position: absolute;
+  height: 500px;
+  width: 200px;
+  background-color: red;
+}
+
+.second {
+  position: absolute;
+  height: 400px;
+  width: 200px;
+  background-color: blue;
+}
+
+.third {
+  position: absolute;
+  height: 300px;
+  width: 200px;
+  background-color: pink;
+}
+
+.fourth {
+  position: absolute;
+  height: 200px;
+  width: 200px;
+  background-color: yellow;
+}
+
+.fifth {
+  position: absolute;
+  height: 100px;
+  width: 200px;
+  background-color: green;
+}
+</style>
+
+<div class="container">
+  <div class="first">
+    <div class="second">
+      <div class="third">
+        <div class="fourth">
+          <div class="fifth"></div>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>