Not for review - Rebase of crrev.com/62833003

LayoutTests/fast/workers/resources/scroll-linked-effects.css

+/*
+ * Copyright 2014 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+body {
+  margin: 0;
+}
+
+#scroller {
+  position: absolute;
+  left: 10px;
+  top: 10px;
+  overflow: scroll;
+  width: 300px;
+  height: 500px;
+  border: 1px solid #ccc;
+}
+
+#scrolled {
+  width: 10px;
+  height: 10000px;
+  background: white;
+}
+
+.card {
+  position: absolute;
+  left: 500px;
+  top: 200px;
+  will-change: transform;
+  width: 100px;
+  height: 100px;
+  border-radius: 15px;
+}
+
+#dancer {
+  background: #eee;
+  z-index: 2;
+}
+
+#shadow {
+  background: #aaa;
+  -webkit-filter: blur(5px);
+  z-index: 1;
+}